Keep It Hidden, Keep It Safe! Create an eye-catching and imaginative self-propelled wooden mechanical model kit that can be assembled without glue. UGears designs are inspired by real-life mechanisms and embody our love of art and ingenuity building these beautiful working models should be fun, models provide an engaging and rewarding experience. Considering safe-cracking as a profession? This might be just where you should start. Build your own safe (made out of plywood and birch) with a personal lock combination, store your most precious items in the safe (jewelry or candy, your choice), and then promptly forget your combination! Follow the handy steps in the instructions to master the mix of slow knob twists and careful listening to tumbler movements that will open the lock. Will you retrieve your items, or will you have to hire a locksmith? Try it and see.For Ages 14+Specs6.1” x 5.5” x 4.1” – Once AssembledNumber of Parts: 179Assembly challenge: Medium (6-7 hours)