Have been trying to build a Theo Jansen mechanism from straws and paper fasteners…why? well the movement is unfamiliar, but seems attractive. I have built a small-scale Strandbeest from a plastic kit ( purchased online) and entertainingly enough, it does actually work, when cranked by hand! However, the wind turbine mechanism, designed to make it ‘walk’ independently, is a total flop. Plastic gear cogs have difficulty in being positioned accurately enough. The result is that they have a ‘çatch point’ somewhere in the rotation, which makes a jump-like movement…. also means it can’t be wind-powered. However, removing the turbine creates a smooth movement that is very nice to watch.
I have been wondering about investigating a ‘çubli’, since they look rather fun ( self-righting cubes that can balance on a vertex, or an edge).