Here is my latest LEGO model, a completely functional custom built marble maze game, commonly known as a Labyrinth.
Edit: This project achieved 10,000 supporters and passed the review process! It is now an official LEGO Ideas set. For more details, check out the Maze page!
It features a built in removable ball storage container, travel lock, and interchangeable mazes. I also designed a Space themed and Medieval themed maze, which you can see below.