Taylor, Barbara <br/><br/>
Zips have teeth and other questions about inventions 
Barbara Taylor 
 - 32p.  col. ill.  28cm. 
 - I Wonder Why .
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>9780753405253 
<br/><br/><label>Dewey Class. No.: </label>600