Simple Snake in Envelope Prank

thingiverse

This prank relies on a single ordinary rubber band for power. Attach the spinner to its base as shown with a rubber band, twist it up, and then place it inside an envelope! It also works great in more imaginative ways, such as underneath computer mice, keyboards, coasters, etc. Anywhere it can be trapped flat and released unintentionally will cause a loud spinning and jumping fit that is sure to surprise almost anyone. Prank safely!