Instructables: Mechanical Cam Toys
Instructables

Cam toys (aka automata) use hand-powered mechanisms to create cyclical motions that animate a scene.

PBS Kids: Design Squad Global - How Does a Zipper Work?
PBS Design Squad

Zip up! Watch as Deysi explains how the different parts of a zipper work together to open and close a piece of fabric.

SciGirls Connect: Crank It Up
SciGirls Connect

Machines help us get work done; some are complex, with lots of moving parts, and others are simple.

SciGirls Connect: Pedal Power
SciGirls Connect

Biking is fun for all ages, but can be tough unless you’re in the right gear.

But Why?: How Does An Engine Work?
But Why?

We learn about chainsaws from Ashleigh Belrose, an instructor the Center for Technology in Essex, Vermont.