Math Puzzle, String, Bead, Topology

cults3d

This mechanical puzzle is a standout in recreational topology, and it's simple to create using wooden materials. For those with curious minds, here's a 3D version. Once you've printed the two parts - the board/stick and the bead - use a piece of string (rope, yarn) to assemble it as shown. The challenge is to move the bead from left to right or vice versa. The main idea revolves around moving the knot back and forth through the middle opening. Let's keep the puzzle's fun intact for now. Reference: Gardner, Martin, 2008. Origami, Eleusis, and the Soma Cube. Cambridge University Press.