Taylor, Barbara <br/><br/>
I wonder why zips have teeth  : and other questions about inventions  

 - 32 pages :  color illustrations 
 - I wonder why series .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9780753405253 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Children's questions and answers--Miscellanea<br/>Curiosities and wonders--Miscellanea--Juvenile literature
<br/><br/><label>Dewey Class. No.: </label>030.92