A Buster® Cube will engage, mystify and delight your little smarty in equal measure. Just fill it with dry food or treats, roll it past your dog and let the fun begin. When it rolls, it dispenses food. The dog will keep very busy, gradually learning how to roll it to release the tasty bites inside, and suddenly playing is rewarded! And as she gets better at it, you can adjust the degree of difficulty to keep things interesting.