Tetrahedron Joiner Block

I designed this connector blocker a little fun project with my Children. It is a great learning project for Geometry, Chemistry and just for plain out sculpture fun.
In my model, We used 300mm long 10mm wooden dowels.
I have also added another variant in which the holes for the rods have been scaled to 10mm so that you can scale it yourself for whatever application (It is a nicer base shape too)
The model was designed in Fusion360 and was printed in PETG for the photos.
Surprisingly difficult to design, See the following link for some of the maths involved for this shape. https://www.mathalino.com/reviewer/solid-mensuration-solid-geometry/regular-tetrahedron
Have Fun with it.