00684cam a2200169 4500 9763003 TxAuBib 20071024120000.0 ||||||s2008||||||||||||||||||||||||und|u 9781596041370 1596041374 TxAuBib Pipe, Jim. Balancing: Cranes, Scales, and Seesaws. Stargazer Books, 2008. Contents contain information about balance, weight, a wide base, heavy and light, tilting and tipping, on the water, seesaws, scales and cranes, high up, wheels, wings, and rotors : There is a quiz and an index ; 32p.