Marble Maze Box

A set of Marble Maze boxes I made! An easy, medium, and hard. On the top of each box is the maze for each layer you must progress through. The easy and medium aren't too hard, but once you get to hard! Haha. You'll have to listen carefully as you blindly navigate a marble through a treacherous path full of twisty turns and traps! Can you make it to the end?! Should be able to accommodate a metal ball or marble up to 15mm. I use the metal balls from my Gravitrax set, along with some glass marbles