$14.95

The wheel, the catapult, the barometer, the battery‹what do they have in common? How and why were they invented? How can you create them again from scratch? Youngsters learn the ins and outs of the most famous inventions and experience the excitement of inventing. Each "Inventor's Challenge" activity invites students to become inventors themselves and devise a battery out of a potato, make a magnetic game, create new paints, develop an elevator, and much more.