Tomecek, Stephen M. <br/><br/>
What a great idea! :   Inventions that changed the world / 
By Stephen M. Tomecek : Illustrated by Dan Stuckenschnelder 
 - First Scholastic paperback printing, September 2003 
 - New York :   Scholastic ;  2003.  
 - 112 pages :   color illustrations ;  26 cm .  
<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/><label>ISBN: </label>9780439609654 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Renaissance history--Non-fiction<br/>Medieval history--Non-fiction
<br/><br/><label>LC Class. No.: </label>T15 .T695 
<br/><br/><label>Dewey Class. No.: </label>609