This looks like it would solve a problem for me, thanks for sharing! Candidly, I'm a bit turned off by the name, the framing as a "toy", and honestly the ergonomics of the website (compared to similar systems like https://gridfinity.xyz/ or https://gridbeam.xyz/), but the underlying system seems like what I'm looking for.
I've been prototyping some models with a 3D printer, and have unfortunately been building my own sort of "construction set" so that I can minimize my print times and only reprint the parts that have changed. This means that I can mostly print flat pieces, which take an hour rather than 12 hours, but trying to invent a modularity system takes time (and iterations), which detracts from iterating on the thing I'm actually working on.
Yeah... I have a similar problem I want to work on in the coming months that I think people traditionally often used to solve with the help of Fischertechnik and the like, so this might be helpful there.
I've been prototyping some models with a 3D printer, and have unfortunately been building my own sort of "construction set" so that I can minimize my print times and only reprint the parts that have changed. This means that I can mostly print flat pieces, which take an hour rather than 12 hours, but trying to invent a modularity system takes time (and iterations), which detracts from iterating on the thing I'm actually working on.
For anyone having trouble navigating the website, I'd recommend starting at https://www.stemfie.org/parts?view=category&id=14, or maybe skimming https://thangs.com/designer/Stemfie3D/sort/downloads if you just want to see the most commonly used pieces.