A few months back, I enjoyed assembling the Gakken Karakuri Somersault Doll (I got mine online from the Maker Shed). What’s amazing about the doll is that it slowly completes a series of backward somersaults due to its internal mechanics and the potential energy it has from starting on the top of several steps. The mechanism was designed long ago during the Japanese Edo period. The hardest part of the build is probably threading the [...]

