Hello. I made 2 topologicial math puzzle 3d printable model. With these models you can easily 3d print topologicial puzzles and connect them with some rope. All models are 3d print friendly. I published them on thingiverse. Here link on Thingiverse: https://www.thingiverse.com/thing:3628460
For my other projects visit my page: https://www.thingiverse.com/bilgehoca/designs
My Youtube channel: https://www.youtube.com/c/BekirBilge
You can use this puzzle for Math education.
This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/kh0bVZ9CKJM