Kangaroo $10 This 200 page catalog of

This 200 page catalog of never-before-seen contraptions is equal parts brilliant

Make fizzy reactions with acids and bases to dissolve shells and extinguish candles

51" x 32" x 14

Dave shares both ordinary and life-changing moments with humor and insight

Kangaroo $10 This 200 page catalog ofThere are 65 kangaroo species ranging from the small tree kangaroo to the red giant kangaroo, which is the largest of all. When it stands upright, it is as tall as an adult human. These marsupials have a kind of rubber band in their hind legs. It propels them upwards with each jump. The faster a kangaroo bounces, the farther the animal is catapulted forwards, and the less energy it consumes.