Part 1
Four-Legged Walkers
Six-Legged Walkers
Two-Legged Walkers
Part 2
Using Wind
Using Weights
Movement Through Vibration
Using Springs
Part 3
Using Magnets
Using Lights
Using Pneumatics
Using Solar Panels
Part 4
Chairs and Tables
Off-Center Axis of Rotation
Intermittent Movement
Changeover Mechanisms
Changeover by Switching a Motor's Rotational Direction
Mystery