ROBOTIME 3D Wooden Puzzle Model Kits Car for Teens and Adults to Buid Mechanical Construciton Craft Sets (Grand Prix Car)Original Design Comes with cutting technology , no burrs, smooth wooden sheets. Safe material and strictest quality control. You will have good building experience. Easy to Build 220 wood pieces, easy to follow with illustrated English instruction. You may need to pop out the little wood pieces carefully ste[ by step incase of broken. It will take about 3 hours to complete of course have difference for different people. Build CAR MODEL by Yourself