A pair of traditional Japanese geta sandals moves forward on its own with a little hopping motion. Turn it over and the mechanism is made from LEGO parts and a motor. It can also move backward.

The device was exhibited by Sugoi Lab at Maker Faire Tokyo 2026 and featured in a report on the event.

See the section 'コアメモリにダーツ、LEGO —— 古い技術と遊び心' in the linked article.

Maker zomb23 built a drum machine around a rotating cylinder covered in LEGO studs. Orange pieces are placed on the grid to program beats, while a smartphone camera watches the cylinder and triggers sounds according to which pieces reach the front.

Spin the cylinder faster and the tempo increases; turn it the other way and the sequence plays in reverse. A software-style step sequencer has been turned into a physical object you can reprogram with LEGO and control by hand.