STEMFIE rubber band-driven car ready for testing


I have been developing a 3D-printable construction set toy for some time. It is now ready to be launched publicly for everyone to download and make. I’ll be releasing all the files for the complete construction set, continuously. Please check out the project and hope you have fun 3D-printing!

Projects files:

I’ll post updates continuously and also send out information via the newsletter:

Cheers, :slight_smile:
Paulo Kiefe


Ok, this is pretty damn cool. My daughter is only 27 months old, but this may be in her future. :nerd_face:

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I was looking at the design, thinking it needed a freewheel so it could coast after the rubberband tension was released, but then I noticed how the string is designed to release from the axle to achieve the same effect, but simpler and more effective. Nicely done.