Tomecek, Steve. <br/><br/>
What a great idea! :  inventions that changed the world / 
 Inventions that changed the world 
Stephen M. Tomecek ; illustrated by Dan Stuckenschneider. 
 - 1st ed. 
 - New York :  Scholastic Nonfiction,  2003. 
 - 112 p. :  ill. (some col.), col. maps ;  27 cm. 
<br/><br/>Includes bibliographical references (p. 109) and index. 
<br/><br/> Profiles forty-five historic and prehistoric inventions, explaining how they work and describing their origins and impact. Includes such developments as the hand ax, the axle, writing, money, the clock, anesthesia, and the nuclear reactor. 
<br/><br/> 8.2  Follett Library Resources  5-8 
<br/><br/><label>ISBN: </label>0590681443 
<br/><br/><label>LCCN: </label>2001020937 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventions--History--Juvenile literature.<br/>Inventions--History.<br/>Inventions--History.
<br/><br/><label>LC Class. No.: </label>T15  / .T695 2003 
<br/><br/><label>Dewey Class. No.: </label>609