01475cam a2200301 4500 103486612 TxAuBib 20120516120000.0 031114s2004||||||||||||||||||||||||eng|u 2003025202 9781402709005 $12.95 1402709005 $12.95 (OCoLC)53483550 TxAuBib Levine, Shar, 1953- Mighty machines / by Shar Levine and Leslie Johnstone ; illustrated by Steve Harpster. New York : Sterling Pub., 2004. 48 p. : col. ill. ; 21 cm. First science experiments (Sterling Publishing HARDBACK. How do machines work? Kids will have a blast constructing a mini-seesaw to illustrate the way a lever operates or creating their very own pulley from an empty spool, string, ribbon, pails, pennies, a broom, and two chairs. They’ll find out why they can’t put in a screw using only their fingers and examine the different parts of compound machines. In another experiment, a child’s bicycle becomes a laboratory for understanding whether wheels have to be smooth to run. A good time will be had by all. 20120516. Simple machines Juvenile literature. Johnstone, Leslie. Harpster, Steve. First science experiments (Sterling Publishing. TXMOO