Hands Craft DIY 3D Wooden Puzzle Music Box for Kids and Adults. Comes with step-by-step, easy to follow assembly guide. Glue and tools included. Average assembly time is between 1-2 Hours. Laser-cut technology makes the wooden puzzle pieces pop out smooth with no burrs or rough edges. Non-Toxic Plywood, 174 piece set. Let's you enjoy the melody - "IT'S A SMALL WORLD".