A series of simple machines help collect mushrooms and crush them to produce a drink for Dr. Robotnik.

Sid and his friends learn that wheels make things easier to move. They write down their observations and state them to their teacher, Suzy.

The wheel breaks on the CyberSquad's scooter, and they need to replace it in order to stop Hacker. They decide to shape one of the stones on the ground into a wheel. Their first attempt fails because the wheel is not round. After more thinking about circles, they figure out how to create a proper wheel.

Sid's dad shows him how wheels work on the computer. As a result, Sid figures out what he needs to do in order to fix his toy truck.

After the dam breaks, the group tries to escape the town before the bridge collapses from the floods. Everyone safely crosses the bridge except for Paul.