Ukidz UGEARS Aero Clock 3D Wooden Puzzles for Adults and Kids - Laser-Cut 3D Puzzle Clock to Build - Elegant Outlook DIY Wooden Puzzle Mechanical Clock Kit - Wall Clock with Pendulum Wood Model KitMechanical clock puzzle: Aero Clock is a fully functioning DIY wall clock with a pendulum and is the #1 "most requested" model building kit by our loyal customers Be the proud clocksmith: Like all UGEARS 3D puzzles for adults and kids, you are the creator in chief. You build it, mount it on a wall, then wind up this pendulum clock kit and watch the minutes tick by Elegant simplicity: This mechanical clock is driven by the force of gravity and has a