Mason Crest Publishers <br/><br/>
Why Why Why Do Clocks Have Hands? 

 - Broomall, Pa. :  Mason Crest,  2009, c2006. 
 - 32 p. :  col. ill. ;  31 cm. 
 - Why why why .
 - Why why why. .
<br/><br/> Includes index. 
<br/><br/> Answers questions about inventions and technology, including questions about the earliest inventions, first car, jumbo jet, and microwaves. 
<br/><br/><label>ISBN: </label>9781422215807 1422215806 
<br/><br/><label>LCCN: </label>2009282001 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Inventions--Juvenile literature.
<br/><br/><label>LC Class. No.: </label>T48  / .W49 2009 
<br/><br/><label>Dewey Class. No.: </label>600 MCP