• Mechanical 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 miniature hot air balloon instead of the classic cuckoo to mark the hour. The balloon descends when the hour strikes, then it slowly rises again for the next 60 minutes
• Challenging adventure: Assembling this 3D puzzle construction guarantees you 11 hours of fascinating building either on your own or in good company

Impressive gift: This 3D clock puzzle is both a timely and timeless gift. Get our exquisite mechanical gear clock kit and delight all the horologists, hobbyists, explorers, creatives, and romantics in your life

We don't accept return, but if the product you receive is broken or wrong, we will provide full or partial refund.