Twenty miles out in the country, where the kids had days of totally unstructured playtime, and dear camp owner Karen Lawrence always made sure they had piles of plywood, two-by-fours, hammers, saws, nails, and a sturdy tree on which to build their own tree house. Before each session wh...
Geology Store: Hammers, field bags, hand lenses, maps, books, hardness picks, gold pans. Earth Science Records: Highest mountain, deepest lake, biggest tsunami and more. Diamonds: Learn about the properties of diamond, its many uses, and diamond discoveries. USGSUSGS explains the Water Cycle...