A group of young boys create a catapult with the intention of using it to throw the ball back over the fence. Their attempt fails when The Beast intercepts the ball and attacks their machine.

Jerry on his way to buy the latest edition of the newspaper, accidentally rolls his coin into a construction site. The coin causes a chain reaction that traps Tom into a stack of bricks.

Sophie illustrates the six basic simple machines that exist and explains how they are useful in our everyday lives. She defines force and work and mentions that simple machines reduce the amount of work required for a task.

Cro and Pakka have to make a pulley system to rescue Og, after he falls off a cliff into a tar pit.

When Cro and Pakka meet for the first time, Cro shows her his new trick w a log. She explains to him that it is actually a lever that he is using and how it works.