KINGOU Wooden Color Chess Crazy Four Keychain Burr Puzzles Brain Teaser Toy Material: Quality timber. Size: 13 x 3.5 x 2.8 cm. Recommended for ages 5 & up, children should be used under adult supervision, water-based paint, touch smooth. Shipped by USPS, usually delivered in 15 working days. To make it challenging and fun, parcel without paper instructions, if you need solutions, please contact us.