This month we want you to build a tree, with a mathematical twist! Discover how to build a tetrahedron from a net, then join 4 (or more!) tetrahedrons to make a Sierpinski tetrahedron. We call these TetraTREEdrons!

You can join 4 tetrahedrons to make a Sierpinski tetrahedron (a tetratreedron!) – something mathematicians call a fractal – a never ending pattern of self-similar shapes that repeats itself.