littleBits Electronics Button
This is one individual littleBits bit:
The button Bit is a classic: big, round and springy for comfortable pressing! Push to turn your creation on, and release to turn it off. Snap a buzzer in place after your button to sound out signals in morse code!
What's littleBits? littleBits is an opensource library of electronic modules that snap together with magnets for prototyping, learning and fun.
