Keeping your cat mentally stimulated is important, especially if you aren't around all day to play with them. Nina Ottosson's MixMax puzzle set is an awesome way to get your cat to work out his brain! Place a treat in the little caps, and your cat has to drag the cap out of the pathway to drop the treat. There are three levels of the puzzle, so you can pick accordingly to your cat's abilities, and he can grow! Each of these puzzles is interlocking, so you can make a large maze through which your cat has to navigate the treat out of. It's smart, fun, and stimulating. -TC