Marble maze made out of Legos

The idea is that you put a marble into the top, and have to navigate it through the “maze” so that it falls through a hole in one level to go to the next, and eventually comes out the bottom. You can either make it so there are little holes to view the marble through (like I did), or make it completely “blind.” You can design these in all sorts of ways, including making it so that the maze has to be manipulated in many different ways.

My son loved the one I made for him, and makes his own now.

See photos below