This one had me scratching my head at around 2am last night for around 40 min. I've noticed I get way more into designing the ones that stump me. It's like I'm proving to myself it can be done. I think Mario and the plumbers of the world would be proud of this one.

Available in raw resin $10 and painted $20 (last picture is an example of a random unpainted dice)

All my dice are made from solid 3d printed resin. The painted versions are sprayed with 3 layers of clear coat so they are usable but I would suggest rolling them on a soft surface to avoid chipping or wear and tear on the paint job.