Unconventional Switch - Magic Potion

 

This device combines the fact that salt water is conductive with the concept that shaking things is fun. The switch was constructed by dangling two wires into a semi-sealed plastic container with a small amount of very salty water. When left alone, the wires do not both touch the water and leave the switch is open. Shaking the container so that the moving water touches the exposed end of both wires closes the switch.
This switch connects to materiality by encouraging the user to pick it up and continuously engage with the container and water in order to activate the light. The label on the container draws the user in to play, but the imperfect seal creates a layer of risk that overly vigorous play may break the switch (and/or get water everywhere).