Keep em' busy! Puzzles for Dogs

My friend and I were exchanging info on how to keep your dog busy and we saw this doggie puzzle at a pet shop the other day. It's a plush toy and comes in a few different styles and sizes. You're supposed to put the plush animals inside and your dog pulls them out and becomes "fascinated"!!! Really??? I'm not sure if the dog has a preference over squirrels or bees, but it sure is cute and I'm tempted to get one :-) They sell for $10.99 + up online and I imagine I'll have more fun than my dog!