KINGOU Wooden Ball Lock Burr Puzzle Intellectual Toys Enhance Spatial Thinking Disassembly Toy Material: Schima superba; Size: 2.75 x 2.75 x 2.75 inch(7*7*7cm) Recommended for ages 3 & up, children should be used under adult's supervision, water-based paint, safe non-toxic, touch smooth By disassemble and assemble this ball burr puzzle can enhance your space thinking & practical ability. To make it challenging and fun, parcel without paper instructions, if you need solutions, please contact us. Shipped by USPS, usually delivered in 10-12 working days.