Unnecessary Inventions created SwingStepper, a robotic swinging arm that holds a smartwatch and moves it to accumulate step counts while the wearer relaxes. The creator presents the working invention on their site.

Sole-Sageel automates the gesture of lowering your beer mug below the other person's during a toast. Two long-stroke solenoids physically raise and lower the mug.

The device was created by Pokosute for Takaha Kiko's 13th Solenoid Contest, where it won an award for especially absurd and useless creations. On the linked page, see the section titled 自動忖度マシーン「ソレサゲール」.

Shintaro Tamefusa built a rig that makes a cold croquette appear piping hot: as he pulls it apart with both hands, he steps on a foot pump and sends smoke through a tube behind the food.

Smoke from a smoke machine is stored in a sealed container and pushed through the tube by the foot pump. When he compared the effect with an actually heated croquette, the real one was painfully hot but produced barely visible steam, while the cold croquette with added smoke looked much hotter.

A Rube Goldberg machine sends balls, levers and other mechanisms through a long chain reaction before a wooden hand finally pulls down a jacket zipper. After all of the staged motion, the final task is simply opening the zipper on a piece of clothing.

The machine was created by Steven Price of Sprice Machines, a builder specializing in chain-reaction contraptions.