Each set includes 4 orange cylinders for blocking the drawers and 4 regular cylinders for hiding treats. Once the cylinders are removed, your dog can spin the circular part of the puzzle to uncover even more hidden treats. This special occasion puzzle is the perfect gift to celebrate your dog’s birthday. Use the included numbered sticker (1 to 18) to mark the special day and make it even more memorable with an interactive game that exercises your dog’s mind and body — and lets you spend quality time together. You can easily adjust the puzzle’s difficulty by adding or removing the blocking tokens to match your dog’s age and experience level.