Apply 5V and be shaken by this small but powerful vibration motor. It works great as an physical indicator without notifying anyone but the wearer.
The motor is a surface-mount component, which reduces the chance of it becoming damaged through use, as there are no wires running along it to get snagged like there were on the original version of this board.
Dimensions: 20mm outer diameter; 0.8mm thin PCB
LilyPad is a wearable technology developed by Leah Buechley and cooperatively designed by Leah and SparkFun. Each LilyPad was creatively designed to have large connecting pads to allow them to be sewn into clothing. Various input, output, power, and sensor boards are available. They're even washable!