Martin, Justin McCory <br/><br/>
Muscles 

 - New York 
 -  il. 
 - 2010 
 - Science sight word readers .
<br/><br/> When you smile, muscles are hard at work. Learn more facts about your muscles in this book. (Grade level: Kindergarten - 2 
<br/><br/><label>ISBN: </label>9780545247962 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Exercise Book<br/>Children's Literature<br/>Human body