diff --git a/lib/__pycache__/models.cpython-312.pyc b/lib/__pycache__/models.cpython-312.pyc
new file mode 100644
index 000000000..58f8b9c20
Binary files /dev/null and b/lib/__pycache__/models.cpython-312.pyc differ
diff --git a/lib/alembic/README b/lib/alembic/README
new file mode 100644
index 000000000..98e4f9c44
--- /dev/null
+++ b/lib/alembic/README
@@ -0,0 +1 @@
+Generic single-database configuration.
\ No newline at end of file
diff --git a/lib/alembic/env.py b/lib/alembic/env.py
new file mode 100644
index 000000000..3a8b93ced
--- /dev/null
+++ b/lib/alembic/env.py
@@ -0,0 +1,78 @@
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+from models import Base 
+from alembic import context
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+target_metadata = Base.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()
diff --git a/lib/alembic/script.py.mako b/lib/alembic/script.py.mako
new file mode 100644
index 000000000..55df2863d
--- /dev/null
+++ b/lib/alembic/script.py.mako
@@ -0,0 +1,24 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}
diff --git a/lib/debug.py b/lib/debug.py
index 4f922eb69..fd9742a5e 100644
--- a/lib/debug.py
+++ b/lib/debug.py
@@ -1,9 +1,14 @@
 #!/usr/bin/env python3
 
 from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+from models import Base, Company, Dev, Freebie
 
 from models import Company, Dev
 
 if __name__ == '__main__':
     engine = create_engine('sqlite:///freebies.db')
+    Session = sessionmaker(bind=engine)
+    session = Session()
+
     import ipdb; ipdb.set_trace()
diff --git a/lib/freebies.db b/lib/freebies.db
index 12beb1c96..3bb33ddc5 100644
Binary files a/lib/freebies.db and b/lib/freebies.db differ
diff --git a/lib/migrations/__pycache__/env.cpython-312.pyc b/lib/migrations/__pycache__/env.cpython-312.pyc
new file mode 100644
index 000000000..eb99a8cb1
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diff --git a/lib/migrations/versions/0da7779a6253_create_seed_py_for_test_parameters.py b/lib/migrations/versions/0da7779a6253_create_seed_py_for_test_parameters.py
new file mode 100644
index 000000000..95b1bc12d
--- /dev/null
+++ b/lib/migrations/versions/0da7779a6253_create_seed_py_for_test_parameters.py
@@ -0,0 +1,28 @@
+"""Create seed.py for test parameters
+
+Revision ID: 0da7779a6253
+Revises: 8e26b5ee0ada
+Create Date: 2025-05-26 13:27:00.692602
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '0da7779a6253'
+down_revision = '8e26b5ee0ada'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
diff --git a/lib/migrations/versions/16d3bd88588f_create_tables.py b/lib/migrations/versions/16d3bd88588f_create_tables.py
new file mode 100644
index 000000000..eb8723757
--- /dev/null
+++ b/lib/migrations/versions/16d3bd88588f_create_tables.py
@@ -0,0 +1,28 @@
+"""Create tables
+
+Revision ID: 16d3bd88588f
+Revises: 349255ddbe32
+Create Date: 2025-05-26 13:10:57.060752
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '16d3bd88588f'
+down_revision = '349255ddbe32'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
diff --git a/lib/migrations/versions/349255ddbe32_initial_commit.py b/lib/migrations/versions/349255ddbe32_initial_commit.py
new file mode 100644
index 000000000..d5eb9416a
--- /dev/null
+++ b/lib/migrations/versions/349255ddbe32_initial_commit.py
@@ -0,0 +1,24 @@
+"""initial commit
+
+Revision ID: 349255ddbe32
+Revises: 5f72c58bf48c
+Create Date: 2025-05-24 20:32:36.007700
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '349255ddbe32'
+down_revision = '5f72c58bf48c'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    pass
+
+
+def downgrade() -> None:
+    pass
diff --git a/lib/migrations/versions/4d687419ba60_revised_seed_py_for_test_parameters_in_.py b/lib/migrations/versions/4d687419ba60_revised_seed_py_for_test_parameters_in_.py
new file mode 100644
index 000000000..2896d7ada
--- /dev/null
+++ b/lib/migrations/versions/4d687419ba60_revised_seed_py_for_test_parameters_in_.py
@@ -0,0 +1,28 @@
+"""revised seed.py for test parameters in reverse
+
+Revision ID: 4d687419ba60
+Revises: 0da7779a6253
+Create Date: 2025-05-26 13:31:20.909756
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '4d687419ba60'
+down_revision = '0da7779a6253'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
diff --git a/lib/migrations/versions/6c61e603a123_added_aggregate_methods.py b/lib/migrations/versions/6c61e603a123_added_aggregate_methods.py
new file mode 100644
index 000000000..511aa0eb2
--- /dev/null
+++ b/lib/migrations/versions/6c61e603a123_added_aggregate_methods.py
@@ -0,0 +1,28 @@
+"""added Aggregate Methods
+
+Revision ID: 6c61e603a123
+Revises: c28595cd3935
+Create Date: 2025-05-26 13:53:09.229066
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '6c61e603a123'
+down_revision = 'c28595cd3935'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
diff --git a/lib/migrations/versions/8e26b5ee0ada_create_seed_py_for_test_parameters.py b/lib/migrations/versions/8e26b5ee0ada_create_seed_py_for_test_parameters.py
new file mode 100644
index 000000000..f1a282d4f
--- /dev/null
+++ b/lib/migrations/versions/8e26b5ee0ada_create_seed_py_for_test_parameters.py
@@ -0,0 +1,28 @@
+"""Create seed.py for test parameters
+
+Revision ID: 8e26b5ee0ada
+Revises: 9561701f4dee
+Create Date: 2025-05-26 13:18:43.272155
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '8e26b5ee0ada'
+down_revision = '9561701f4dee'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
diff --git a/lib/migrations/versions/9561701f4dee_create_freebies_table.py b/lib/migrations/versions/9561701f4dee_create_freebies_table.py
new file mode 100644
index 000000000..4e891bb69
--- /dev/null
+++ b/lib/migrations/versions/9561701f4dee_create_freebies_table.py
@@ -0,0 +1,37 @@
+"""Create freebies table
+
+Revision ID: 9561701f4dee
+Revises: 16d3bd88588f
+Create Date: 2025-05-26 13:13:58.993750
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '9561701f4dee'
+down_revision = '16d3bd88588f'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('freebies',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('item_name', sa.String(), nullable=True),
+    sa.Column('value', sa.Integer(), nullable=True),
+    sa.Column('dev_id', sa.Integer(), nullable=True),
+    sa.Column('company_id', sa.Integer(), nullable=True),
+    sa.ForeignKeyConstraint(['company_id'], ['companies.id'], name=op.f('fk_freebies_company_id_companies')),
+    sa.ForeignKeyConstraint(['dev_id'], ['devs.id'], name=op.f('fk_freebies_dev_id_devs')),
+    sa.PrimaryKeyConstraint('id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('freebies')
+    # ### end Alembic commands ###
diff --git a/lib/migrations/versions/__pycache__/0da7779a6253_create_seed_py_for_test_parameters.cpython-312.pyc b/lib/migrations/versions/__pycache__/0da7779a6253_create_seed_py_for_test_parameters.cpython-312.pyc
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diff --git a/lib/migrations/versions/__pycache__/c28595cd3935_used_unique_lists_to_avoid_duplicates_.cpython-312.pyc b/lib/migrations/versions/__pycache__/c28595cd3935_used_unique_lists_to_avoid_duplicates_.cpython-312.pyc
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diff --git a/lib/migrations/versions/__pycache__/f85d30582ce2_used_unique_lists_to_avoid_duplicates.cpython-312.pyc b/lib/migrations/versions/__pycache__/f85d30582ce2_used_unique_lists_to_avoid_duplicates.cpython-312.pyc
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diff --git a/lib/migrations/versions/c28595cd3935_used_unique_lists_to_avoid_duplicates_.py b/lib/migrations/versions/c28595cd3935_used_unique_lists_to_avoid_duplicates_.py
new file mode 100644
index 000000000..ba23e436e
--- /dev/null
+++ b/lib/migrations/versions/c28595cd3935_used_unique_lists_to_avoid_duplicates_.py
@@ -0,0 +1,28 @@
+"""used unique lists to avoid duplicates (FIXED)
+
+Revision ID: c28595cd3935
+Revises: f85d30582ce2
+Create Date: 2025-05-26 13:48:27.651695
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'c28595cd3935'
+down_revision = 'f85d30582ce2'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
diff --git a/lib/migrations/versions/f85d30582ce2_used_unique_lists_to_avoid_duplicates.py b/lib/migrations/versions/f85d30582ce2_used_unique_lists_to_avoid_duplicates.py
new file mode 100644
index 000000000..525ceead4
--- /dev/null
+++ b/lib/migrations/versions/f85d30582ce2_used_unique_lists_to_avoid_duplicates.py
@@ -0,0 +1,28 @@
+"""used unique lists to avoid duplicates
+
+Revision ID: f85d30582ce2
+Revises: 4d687419ba60
+Create Date: 2025-05-26 13:43:49.700062
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'f85d30582ce2'
+down_revision = '4d687419ba60'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###
diff --git a/lib/models.py b/lib/models.py
index 2681bee5a..b98a641dc 100644
--- a/lib/models.py
+++ b/lib/models.py
@@ -1,6 +1,6 @@
 from sqlalchemy import ForeignKey, Column, Integer, String, MetaData
 from sqlalchemy.orm import relationship, backref
-from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import declarative_base, Session
 
 convention = {
     "fk": "fk_%(table_name)s_%(column_0_name)s_%(referred_table_name)s",
@@ -16,6 +16,32 @@ class Company(Base):
     name = Column(String())
     founding_year = Column(Integer())
 
+    @property
+    def devs(self):
+        return list({freebie.dev for freebie in self.freebies.all()})
+
+    
+    def give_freebie(self, dev, item_name, value):
+        """
+        Create and return a Freebie given to a dev from this company.
+        Note: You need to add and commit the freebie in your session outside this method.
+        """
+        new_freebie = Freebie(
+            item_name=item_name,
+            value=value,
+            dev=dev,
+            company=self
+        )
+        return new_freebie
+    
+    @classmethod
+    def oldest_company(cls, session: Session):
+        """
+        Return the company instance with the earliest founding year.
+        Requires a SQLAlchemy session as argument.
+        """
+        return session.query(cls).order_by(cls.founding_year.asc()).first()
+
     def __repr__(self):
         return f'<Company {self.name}>'
 
@@ -23,7 +49,39 @@ class Dev(Base):
     __tablename__ = 'devs'
 
     id = Column(Integer(), primary_key=True)
-    name= Column(String())
+    name = Column(String())
+
+    @property
+    def companies(self):
+        return list({freebie.company for freebie in self.freebies.all()})
+
+    def received_one(self, item_name: str) -> bool:
+        return any(freebie.item_name == item_name for freebie in self.freebies.all())
+
+    def give_away(self, dev, freebie):
+        if freebie in self.freebies.all():
+            freebie.dev = dev
+            return True
+        return False
 
     def __repr__(self):
         return f'<Dev {self.name}>'
+
+class Freebie(Base):
+    __tablename__ = 'freebies'
+
+    id = Column(Integer, primary_key=True)
+    item_name = Column(String)
+    value = Column(Integer)
+
+    dev_id = Column(Integer, ForeignKey('devs.id'))
+    company_id = Column(Integer, ForeignKey('companies.id'))
+
+    dev = relationship("Dev", backref=backref("freebies", lazy="dynamic"))
+    company = relationship("Company", backref=backref("freebies", lazy="dynamic"))
+
+    def __repr__(self):
+        return f'<Freebie {self.item_name} worth {self.value}>'
+    
+    def print_details(self):
+        return f"{self.dev.name} owns a {self.item_name} from {self.company.name}."
diff --git a/lib/seed.py b/lib/seed.py
index b16becbbb..c7276282a 100644
--- a/lib/seed.py
+++ b/lib/seed.py
@@ -1,3 +1,99 @@
 #!/usr/bin/env python3
 
 # Script goes here!
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+from models import Base, Company, Dev, Freebie  # All models from models.py
+
+engine = create_engine('sqlite:///freebies.db') 
+Session = sessionmaker(bind=engine)
+session = Session()
+
+# clear old data for testing
+session.query(Freebie).delete()
+session.query(Dev).delete()
+session.query(Company).delete()
+
+# Create sample companies
+company1 = Company(name="OpenAI", founding_year=2015)
+company2 = Company(name="Google", founding_year=1998)
+
+# Create sample devs
+dev1 = Dev(name="Alice")
+dev2 = Dev(name="Bob")
+
+# Create sample freebies
+freebie1 = Freebie(item_name="T-shirt", value=20, dev=dev1, company=company1)
+freebie2 = Freebie(item_name="Mug", value=10, dev=dev2, company=company2)
+freebie3 = Freebie(item_name="Sticker", value=5, dev=dev1, company=company2)
+
+# Add and commit
+session.add_all([company1, company2, dev1, dev2, freebie1, freebie2, freebie3])
+session.commit()
+
+# Testing relationships
+freebie = session.query(Freebie).first()
+print(f"{freebie.item_name} was given by {freebie.company.name} to {freebie.dev.name}")
+
+dev = session.query(Dev).first()
+print(f"{dev.name} has received the following freebies:")
+for f in dev.freebies:
+    print("-", f.item_name)
+
+company = session.query(Company).first()
+print(f"{company.name} has given out the following freebies:")
+for f in company.freebies:
+    print("-", f.item_name)
+
+
+# Testing relationships in reverse
+company = session.query(Company).first()
+print(f"{company.name} has given freebies to:")
+for dev in company.devs:
+    print("-", dev.name)
+
+dev = session.query(Dev).first()
+print(f"{dev.name} has received freebies from:")
+for company in dev.companies:
+    print("-", company.name)
+
+#testing aggregate functions
+freebie = session.query(Freebie).first()
+print(freebie.print_details())
+
+# Find a dev and a company
+dev = session.query(Dev).filter_by(name="Alice").one()
+company = session.query(Company).filter_by(name="OpenAI").one()
+
+# Give a freebie
+freebie = company.give_freebie(dev, "Sticker Pack", 5)
+session.add(freebie)
+session.commit()
+
+# Get the oldest company
+oldest = Company.oldest_company(session)
+print(f"Oldest company is {oldest.name}, founded in {oldest.founding_year}")
+
+# Fetch two devs and one freebie owned by the first dev
+dev1 = session.query(Dev).first()
+dev2 = session.query(Dev).filter(Dev.id != dev1.id).first()
+freebie_to_give = dev1.freebies.first()  # Using .first() from lazy='dynamic'
+
+print(f"Before give_away:")
+print(f"{dev1.name} has freebie: {freebie_to_give}")
+print(f"Does {dev1.name} have 'Sticker'? {dev1.received_one('Sticker')}")
+
+# Dev1 gives away the freebie to dev2
+if freebie_to_give:
+    success = dev1.give_away(dev2, freebie_to_give)
+    if success:
+        session.commit()
+        print(f"\nAfter give_away:")
+        print(f"Freebie {freebie_to_give.item_name} now belongs to {freebie_to_give.dev.name}")
+    else:
+        print("Failed to give away freebie (ownership mismatch)")
+else:
+    print("No freebies found for dev1")
+
+# Close the session
+print("✅ Database seeded successfully!")
\ No newline at end of file