Recently the community asked for an easier way to locate the spanner tool onto the nuts, and now a new version of the tool is improved. 

Thanks to excellent feedback from the community testing the STEMFIE car, the spanner tool evolved - it became webbed! :-) This mod, will make it easier to locate the position of the nut while fastening parts. Download this version from this link.

After two years of development and beta-testing, this new construction set toy is almost ready to be publically available for everyone!

The idea of designing a 3D-printable construction set has been on my mind for many years, and I am excited to finally being able to show you the first project made of STEMFIE parts. It is a simple example of a rubber-band-driven car. It is easy to 3D-print, build and fun to play with.