It's almost like having your own mini physics lab between the covers of a book. Clear, straightforward text explains the principles behind such mechanical devices as levers, rotors, pulleys, and windmills, and then ingenious, intricate paper enginerring demonstrates how each works, in five pop-up machines that move. Full color.
Read More
It's almost like having your own mini physics lab between the covers of a book. Clear, straightforward text explains the principles behind such mechanical devices as levers, rotors, pulleys, and windmills, and then ingenious, intricate paper enginerring demonstrates how each works, in five pop-up machines that move. Full color.
Read Less
