Pythagoras tree pendant. (Note: The hoop is a bit small if you need a larger size for a larger diameter chain please message me and I can work ...

This is a dissection puzzle that illustrate the Pythagorean theorems: the sum of the areas of the 2 smaller squares is equal to the area of the big...

This is a puzzle proof of the Pythagorean theorem starting from triangles instead of squares. The puzzle is actually quite difficult.Inspired by Ma...

'Reflection tree' A flat-ish decorative fractal tree with a loop at the top for hanging it up. The unellenu storeon shapeways - for designer object...