I took my Education Puzzle cube project designed in TinkerCAD and incorporated a maze into two of the cubes designed using the lesson developed for junior high and high school students. In the coming weeks I plan to add a directions on how to turn a puzzle cube into a puzzle cube maze.
The challenge is two fold: 1) Assemble the 3x3 cube using the 5 pieces. Keep an eye on the holes becuase, when assembled, they complete an internal maze. 2) Using a .15" ball bearing (the same size ball bearing found in last years fidget spinner 608 bearings) start in one of the outer holes and guide the ball through the maze. Be careful not to get stuck in a trap somewhere along the path. As a hint, going through the maze one direction is markedly easier thatn going in the opposite direction. If you get trapped in the maze, disassemble the cube to find the ball and try again. Remember to use the assembly time to map out the maze. It will make doing the maze a little less challenging.
You will need a .15" (5/32") or similarly sized steel bearing. https://amzn.to/2J2EZzT or harvest from 608 skate bearings popular in fidget spinners. https://amzn.to/2H7gq3i
The project scales well if you want to try larger or smaller prints and need various bearing sizes: https://amzn.to/2xuO5EB