Experiments & Projects, History of Technology 

What a wonderful world we live in--and these fifty imaginative science experiments vividly demonstrate to kids concepts of nature such as gravity, evaporation, friction, density, and absorption. All you need are simple household articles. Fun's a-Poppin': Which is heavier--popped or unpopped popcorn? Harvey and Harry want to know...and here's a "way to weigh" them. All Puddled Up: It rained and rained...but now the sun's out and the water will soon disappear. Where does it go? And which puddles will dry more quickly--the ones that are deep or the shallow ones? How Does Your Garden Grow?: Gary Gardener and Belinda Blossom agree--it takes more than just sticking seeds in the ground to grow a great plant. With a few sponges, shallow pans, birdseed, water, and measuring utensils, see what they mean. Plus: Have barrels of fun building toy boats, preparing frozen yogurt, making music, creating abstract paintings and racing toy cars! 80 pages (all in color), 8 1/2 x 11. - from Amzon