DIY 3D Marble Run

Marble Run 3D mechanical puzzles. These are not just puzzles, they are a fantastic piece of kinetic art. They 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.