Hands Craft DIY 3D Wooden Puzzle Music Box for Kids and Adults. Comes with step-by-step, easy to follow DIY assembly guide. All tools included. Average assembly time is 3 Hours. Recommended age 14+. Laser-cut technology makes the wooden puzzle pieces pop out smooth with no burrs or rough edges. Non-Toxic Plywood, 255 piece set. Let's you enjoy the melody - "IT'S A SMALL WORLD".