Marble Tile Game

I started designing a model to demonstrate Conrad Waddington's Epigenetic Landscape for a course, but when my kid started playing with the pieces of the early prototype, it gave me an idea for this design, which is more playful.

The board and tiles have 6x3mm cylindrical magnets (6mm diameter, 3mm height) embedded in them so the tiles snap into position on the board. The parts are modeled so that the magnets can be embedded mid-print by adding a pause between layers.

The board has holes in the bottom so you can pop the tiles out by pushing them from behind. They'd be difficult to remove otherwise.

One of the parts is a foot, which includes a magnet and snaps into place on the underside of the board to provide it a gentle slope. You can embed two additional magnets in the board on the bottom tray to store the feet inside the tray.

If you intend to add magnets mid-print, make sure you add the appropriate layer pauses to each part when you slice them!

Beware: Most of the magnets are close enough to the bottom of the model so they'll stay put if you have a steel build surface. If you have a glass or some other non-magnetic build surface, they might come loose and stick to any nearby magnets or exposed metal on your hotend or elsewhere on the printer. I recommend keeping an eye on the printer when it prints the first layer or two after adding the magnets.

In the pictures I used 0.2mm layer height for the tiles and feet, and 0.3mm layer height for the board. None of the parts need supports, brims, or rafts; they're all pretty easy to print. I used PLA for everything.