I think I saw something like this in a magazine or on another blog. But we gave it a shot the other day and Nate loved it. We already had the foam shapes. So we just got the muffin pan out and started sorting them by shape and color. He didn't quite stick to the plan the whole time... after awhile he dumped the whole thing but he had fun. And eventually he helped clean up afterward. But its always nice to find a toddler activity that is fun and educational.