A momentary contact Single Pole Single Throw (S.P.S.T.) switch that is based on a Popsicle Stick. It is easy to build and the builder learns how a switch works.
I have been Workshop Editor for both Boys’ Quest and Fun For Kidz magazine for over 15 years. One of my early projects was a Morse Code Telegraph. Of course this project needed a switch to send out the code. I came up with the Popsicle Stick switch since it could be easily made from a Popsicle Stick (a regular craft stick also works fine) and a couple of screws. This I thought would be great for kids to make themselves since in making it they would learn the basic principles of an electric switch. In addition to having a nice sound to its name, the switch worked out better than I hoped. I have used it in numerous other projects, including my Wireless Telegraph, Popsicle Stick Electronic Organ, Solar Powered Flashlight, Electric Buzzer, Reaction Timer Game, Game Timer and more.