Enhance the Mini Play Boxes with our specially designed Slot Tops. These compatible add-on accessories transform your existing play boxes, creating new play possibilities. Available as tops only , they're the perfect complement to your Mini Play Box collection. Mini Play Boxes are sold separately. Specifications Dimensions : Each top has a slot that measures 1.6 inches by 0.20 inches Material : 3D printed from biodegradable, plant-based materials. Options : Choose from sets or buy the tops individually Set of 6, 10, 14, or 15: The set of 6 includes red, orange, yellow, green, blue, and purple The set of 10 includes the same colors but adds teal, dark purple, gray, and pink The set of 14 includes everything in the set of 10 plus lime green, magenta, ice blue, and dark pink. The set of 15 includes everything in the set of 14 plus another red top for the rainbow box Important Safety Information : This is not intended for children under 3 years old or for any child who mouths toys. Supervision is required for children under 6 years old.