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.

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

Mr. Wizard demonstrates that wheels don't always need to be round to function as wheels.

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.

Darth Vader puts a bounty on the Millenium Falcon, which draws the attention of dangerous bounty hunters.