BMW M3 Marble car

A compact, multi-part 3D printable toy car inspired by the iconic BMW E30 M3, designed to roll smoothly on real marbles for a fun and unique driving experience. This model is printed in 2 separate parts: main body and chassis. The print profile has the body printed vertically for better definition however it can also be printed lying flat

Assembly is quick and straightforward, with parts slotting together cleanly for a secure fit. The design uses four 15–16 mm marbles as wheels, creating a smooth-rolling, low-friction motion that makes it perfect as a fidget toy or desk accessory. The model is also designed to use 2 5mm diameter x 2mm round magnets to hold both parts together, however this can be substituted for a 5mm diameter x 5mm pin

Minimal supports required, and no glue, screws, or AMS/multi-material setup needed, making it ideal for single-extruder 3D printers.

This model balances nostalgic styling with simple, functional design—great for makers of all skill levels looking for a fast, satisfying print.