Walberg, Franette. <br/><br/>
Puzzle thinking :  steps to logical thinking and problem solving / 
Franette Walberg ; illustrated by Lynne Reisbord. 
 - Philadelphia, PA :  The Franklin Institute Press,  c1980. 
 - 118 p. :  ill. 
<br/><br/><label>ISBN: </label>0891680276 
<br/><br/><label>LCCN: </label>89080195     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cognition in children.<br/>Logic--Programmed instruction.<br/>Problem solving in children--Programmed instruction.<br/>Puzzles.<br/>Thought and thinking.