Collection: DIY 3D Mechanical Gear Puzzles

Gear driven 3D mechanical puzzles. They are very fun and challenging! These puzzles are the best engineering toy for kids and adults. Great for learning how gear transmission works and how potential energy is created and converted into kinetic energy. But don’t think this is just a kid's game. All the puzzles are very challenging. Enjoy building them and exhibit your fantastic piece of art anywhere you like.