Magic school bus flexes its muscles/ 
Joanna Cole and Bruce Degen. 
 - [S.l.]:  Scholastic,  1995. 
 -  30 min.  30 min. 
<br/><br/> Because he'd rather be playing ball, Ralphie wants to build a robot to do his chores.  As he and his classmates struggle to make the robot, they discover the importance of knowing how joints and muscles work together. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Muscles.
<br/><br/><label>Dewey Class. No.: </label>612