littleBits Electronics Vibration Motor
This is one individual littleBits bit:
The vibration motor Bit is very similar to the device that makes your cellphone shake when you get a text. With this Bit, you can make anything vibrate and buzz. Try attaching the tethered motor to a ping-pong ball to amplify the buzz!
What's littleBits? littleBits is an opensource library of electronic modules that snap together with magnets for prototyping, learning and fun.