This pocket maze fidget helps stave off boredom. Use it in the privacy of your own pocket whenever you are suppose to be paying attention.

This prints in place, and hence, is designed specifically for a 0.2mm layer height. You should also set the printing line widths to 0.4mm. The little knob prints-in-place over the bottom surface (with a 0.2mm gap in between), so you need to set your perimeter printing speed low (~20m/s) so that it the first layer of the knob prints as a circle.

After printing, gently use a small screwdriver to pry the bottom of the knob loose – don't try wrenching on the top of the knob because it might snap off first. To make it shift smoothly, put a tiny dab of oil, light grease or vaseline in the shift track and work it all around with the shift knob. It should glide quite smoothly.