A class of twisted springy models invented by Chris Palmer and Jeremy Shaffer that are mainly based on the iso-area twist folding developed by Tyoaki Kawasaki
A mechanical device designed to interrupt the electrical current in a sign at regular intervals, turning the light source on and off to create a flashing image.
A device for switching one or more lamp circuits on and off. Although flashers may be constructed to provide any animation sequence, certain popular sequences are available. These include flashers to provide border chasing and spelling effects.