Explore the world of motion. Read about many things that move.
We see with our eyes. What places have you seen?
The sphere is the topic of this basic concept book. Photos showing spheres in the real world reinforce the information.
This book uses repetition, simple sentences and supporting images to familiarize the beginning reader with cylinders.
Pressing Down explores the benefits and uses of the lever. RobbO and RobbEE learn how a lever can be formed in three different ways to do different kinds of worklift and lower, separate, and open.
Pulling Up explores the benefits and uses of the pulley. This clever device uses rope wound over a grooved wheel to help lift heavy loads. RobbO and RobbEE use a pulley to remove the engine from their car.
Rolling Along explores the benefits and uses of the wheel and axle. RobbO and RobbEE build a cart to make it easier to move a heavy load, and learn how the wheel and axle are also used for lifting and turning.