Childcraft the how and why library :  how  things  work 

 - Chicago :  World Book - Childcraft International,  2000 
 - 192 p. :œbill ;  26 cm. 
<br/><br/> Index. 
<br/><br/>Introduction -- inventions  in  the  home -- on the move -- signals  in  the  air -- raw material -- creating  and  designing -- answers 
<br/><br/><label>ISBN: </label>0716601583 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Children's encyclopedias and dictionaries