Shane Wighton of Stuff Made Here built an automated washing machine for his muddy dog. Shower nozzles move over a platform and spray from below. But his dog Eva was frightened by the machine, so another dog, Brie, took part in testing.

This camera only takes a photograph when there is a dog in the frame. The presence of a dog is built into the rules for whether the camera can take a picture at all.

It is a creation by Matty Benedetto, who shares deliberately unnecessary inventions on his own site, Unnecessary Inventions.