KINGOU Wooden Triangle Lock Smooth and Slick Lock Logic Puzzle Burr Puzzles Brain Teaser Intellectual Toy Name: Wooden Triangle Lock. Size: 2.56 x 2.56 x 2.56 (inch) Active your brain. Great gift for kids, friends and elders, nice toy for entertainment and decoration on your table. Recommended for ages 5 & up, children should be used under adult supervision, water-based paint, touch smooth. Easy to take it apart, but harder to assemble. Difficulty Rated:  . To make it challenging and fun, parcel without paper instructions, if you need solutions, please contact us.