00928cam a2200277 4500 182206452 TxAuBib 20060721120000.0 060721s2002||||||||||||||||||||||||eng|u 9780516239620 $19 0516239627 $19 TxAuBib Douglas, Lloyd. What is a Wheel and Axle? [Hardcover]. Children's Press, 2002. 24 p. Simple Machines Ages 4 to 8. Introduces the wheel and axle as a simple machine that can make it easier to move heavy objects, as well as to flatten dough. 20060721. Wheels. Tools. Simple machines. Wheel and axle. Simple Machines.