unusual gadget; quirky device
Refers to a gadget or tool that is unusual, eccentric, or seemingly impractical, often with a humorous or inventive twist. The term is associated with the Japanese art of creating such devices.
He is always inventing quirky gadgets.
This unusual gadget looks useless at first glance, but it's surprisingly handy.
Compound of 珍 (chin, 'rare, curious') and 道具 (dōgu, 'tool, implement'). The term was popularized by Kenji Kawakami, the founder of the Japanese art of Chindōgu, which involves creating intentionally impractical yet ingenious gadgets.