STEMFIE user Cantareus, who made the STEMFIE Sailcar, just released this new CommunityProject: Roberval Balance Scales!
You can watch the assembly video below and download Brendon's project files from PrusaPrinters, Thingiverse and Thangs.
Roberval Balance Scales as STEMFIE project by Cantareus
This toy is not suitable for children under three years due to the choking hazard! 
