The file 'Compatible Brick For Balloon Car 3D Printer Model' is (stl) file type, size is 191.0KB.
Kids wanted to make balloon powered "Lego" cars. So here's a 2x6 block with a mount for balloon. Stick it on the car and inflate the balloon and let go!
Printed with no supports in PLA. 0.2mm though less wouldn't hurt.
