http://www.funbrain.com/cashreg/
Scholastic Games http://www2.scholastic.com/browse/scholasticNews.jsp?FromBrowseMod=true&Ns=Pub_Date_Sort|1&CurrPage=scholasticNews.jsp&TopicValue=Scholastic%20News
counting money
adding money
Making Change http://justkidsgames.com/play.php?MakingChange
Counting money http://www.ixl.com/math/practice/grade-3-count-coins-and-bills