Part 1
Four-Legged Walkers
A spider
An ant
A dog
A dynamic walker
A smooth walker with big feet
Six-Legged Walkers
A six-legged walker
An insect-like creature
Two-Legged Walkers
A simple walker
Chicken legs
A walker with square legs and one motor
A walker that shifts its center of gravity
Part 2
Using Wind
A simple electric fan
A propeller that creates wind
A hand-cranked fan
A black electric fan
Increasing rotational speed nine-fold (3 x 3)
Increasing rotational speed twenty-seven-fold(3 x 3 x 3)
A wind-powered car
Gentle lifting power
A big electric fan
An electric fan that moves up and down
An oscillating electric fan
Using Weights
Making your own weights
Pulley-powered cars
A car that moves as a weight descends
An old mechanical clock
A pendulum-powered clock
Movement Through Vibration
Vibration causes motion
Vibrating on shafts
A vibrating sled
A larger spinning mass means more vibration
Directing vibrational energy with wheels
Using Springs
A rocket launcher
A ballista
A Ping-Pong ball pitching machine
An electric Ping-Pong ball pitching machine
A pullback windup car
Part 3
Using Magnets
Various magnet bricks
A seesaw
A clutch
Dancing minifig
Magnetic vehicle suspension
Using Lights
Light bricks
Switching six colors of light
Electric plates
Fiber-optic art
Multicolored light
A lighthouse
A pop-up sports car headlight
Disco lights
A Morse code transmitter
Using Pneumatics
Pumps, cylinders, air tanks, and switches
Basic pneumatics
One end goes down, one end goes up
A pneumatic poking device
Creating rotational movement
A double-jointed arm
Moving the arm with a pneumatic cylinder
Using pneumatics with motors
Using a gear clutch to prevent damage when rotation stops forcibly
Using two pumps with one motor
Using Solar Panels
Solar panels
A solar-powered car
Making wind power
Part 4
Chairs and Tables
A folding chair and a height-adjustable table
A reclining chair and a turntable
Another folding chair
A beach lounge chair
An office chair
Off-Center Axis of Rotation
Placing the axle off center
A propeller that changes its rotational speed
The piston pumps when you turn the handle
The propeller only turns when two gears touch
A car that changes speed (and height)
A car with a traveling propeller
A propeller that changes its speed
A twin propeller
A wiggling car
Intermittent Movement
Mechanisms for intermittent movement
Cars that start and stop
A gear that looks like a flower
Using chains and tracks to start or stop rotation
Changeover Mechanisms
With a switch
With a lever
With a steering wheel
A four-way changeover with a steering wheel
Changeover by Switching a Motor’s Rotational Direction
Using a gear that shifts position
Spin the propeller or move forward
Using a worm gear
Move the arms or move forward
Using a differential gear
Spin the antenna or move forward
Mystery
A mechanically animated face