Hey. This is a Mechanism that transforms a Tetrahedron into an octahedron. It's not really a fidget, just interesting.

You need: 4 Triangle 1 4 Triangle 2 12 bridges 28 Connectors The tool is optional-

There are also "All" Files that have everything you need for a full assembly on one plate.

Print Settings: Standard no Supports.

Assembly: I made an Assembly Video you can find here https://youtu.be/NIur1LrywE4. There is also a PDF Assembly guide included inside the download.

Happy printing.