5100 - Vibrating/Pager Motor 4 x 8 mm (1.5-3 volt)

Very small motor 1.5-3volt.

When used with our LR44 battery (#6432) it makes a great bristle bot. (www.youtube.com) 

Comes in a square sleeve, which makes it very easy to mount using double sided tape. 

If you want to make a quieter, more controlable ,Brislte bot, use (#5105) motor  (easier for younger children)

If you want to make a faster, more out of control Bristle bot (may need a bigger brush or out riggers) use (#5103) motor.