Baum, Arline. <br/><br/>
Opt :  an illusionary tale / 
by Arline and Joseph Baum. 
 - New York :  Puffin,  1989,c1987. 
 - 32 p. :  ill. (some col.) ;  24 cm. 
 - Picture puffins .
<br/><br/> A royal family and court present a variety of optical illusions which are explained at the end of the book. Includes some suggestions for making your own illusions. 
<br/><br/><label>ISBN: </label>0140505733 (pbk.) 
<br/><br/><label>LCCN: </label>88028755 /AC 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Optical illusions--Fiction.
<br/><br/><label>LC Class. No.: </label>PZ7.B3267  / Op 1989 
<br/><br/><label>Dewey Class. No.: </label>E