Here's a set of 12 cards I got from a book package from a Scholastic Book Club order. They came with three books from the author of Captain Underpants. The three chapter books and 12 cards were about $10.

http://tradercracks.com/blog/?p=15259

My son {9} is laughing his butt off looking at these cards, and so am I. LOL
I have to get one of those forums and get these.
Thanks for the heads up.
Fred