Pupcorn is a good choice! Mine LOVE LOVE LOVE Yogurt Drops from Petsmart!
Also, there is a thread about cdleaning products with tons of info about the ones you listed! It is in the product reviews section!
I have the bumbleball but Simon is scared of it and Hallie ignores it ;( I always leave Petsmart with soccer balls and a squeaky stuffed animal for Hallie!
Have fun shopping
