Tetra-Bricks!
thingiverse
*** Tetra - Bricks! *** Tetrahedral interlocking building blocks are a game-changer. There are multiple versions, each with its own unique combination of solid, peg, or hole faces. The openscad file can produce all variations by adjusting the peg_count and hole_count variables. Alternatively, you can use the provided .stl files, which clearly indicate the number of solid, peg, and hole faces in that order. TIP: Print the 3-peg 1-hole version and the 4-hole version first as a test to see how they fit together and come apart easily. Use the openscad file to make any necessary adjustments for optimal results with your printer and material. I personally used PETG, which provides excellent strength and flexibility to the pegs.
With this file you will be able to print Tetra-Bricks! with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Tetra-Bricks!.