The STEMFIE rubber-band-driven car is easy and quick to build and demonstrates the retention and controlled release of energy to achieve motion. The inspiration for this design is borrowed from science classes in schools, using the mousetrap car. 

Information  –  Parts list  –  Build plates  –  Downloads  –  Assembly steps  –  Gallery


  • Number of 3D-printed parts: 44
  • Number of buildplates: 4 plates < 140 x 140 mm)
  • Non-printed items: A short piece of string, three small rubber bands.
  • Tools: Spanner (SPN-TOL-0004) and driver (SPN-TOL-0001)
  • Assembly time: 10 minutes

Parts list

SPS 000001 assembly step0 parts list

Click the links below to download each individual STL file. You can also download the ready-made four build plates.

Build plates

SPS 000001 assembly step0 build plates

Click the links below to download each ready-made build plate.


All the files and instructions for making this project will be released shortly. Stay tuned via the newsletter to receive the download link. Note that you, in the meantime, can do download the ready-made build plates (above) and start 3D printing.

Assembly steps

SPS 000001 assembly step0 tools

SPS 000001 assembly step1

SPS 000001 assembly step2

SPS 000001 assembly step3

SPS 000001 assembly step4

SPS 000001 assembly step5

SPS 000001 assembly step6

SPS 000001 assembly step7

SPS 000001 assembly step8


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