Mario kart item block that I made for an expansion to the board game Heat: pedal to the metal. They're pretty small (10x10 mm) to fit on the board, but would probably look pretty nice scaled up a bit. At 10mm, the bottom and top faces look kind of smushed, but the 4 sides look good.

Printed with multi color filament (red, blue, green), no supports or brims, seams aligned or nearest to avoid layer dots on the faces. I used 25% infill and they're still a little on the light side for board game pieces. Try some different settings out if you plan on scaling and let me know how it goes.