








I made a simple 3D-printable modular block system that snaps together
I made a simple modular block system for 3D printing.
The idea was to keep it easy to print, use as few supports as possible, and make it expandable enough that you can print as many pieces as you want and build larger structures over time.
The blocks were originally designed at 40 mm, but the included 3MF is scaled to 30 mm. After testing, I honestly prefer the 30 mm version because it feels comfortable to handle, prints faster, and makes it easier to produce a lot of pieces.
The cylindrical inserts snap into the blocks, and the blocks have internal guide rails to help keep the inserts from sliding out. I also made a video showing that they fit firmly, hold together well, and do not separate easily.
It is a simple toy-style project, but I’m pretty happy with how solid and satisfying the connection feels.
Print them in different colors, make a pile of them, and build whatever you want.