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 build plates: 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 for larger image

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

Right-click and save the the following build plates (.3mf file format).


You can download the complete file set for this project from this link. The files for 3D printing are available as individual files and as ready-made build plates.

Assembly steps

SPS 000001 assembly step0 tools

SPS 000001 assembly step1

SPS 000001 assembly step2

SPS 000001 assembly step3

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SPS 000001 assembly step8


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