Robots on the cheap! A fun little project to enjoy with your kids. This introduces them to simple circuits.
Here is my video tutorial!
A cheap toothbrush
A coin 3V battery
2 flashing LEDs
One mobile phone coin motor
One sticky pad and sticky clear tape
All of this id available in small quantities on eBay at low cost.
Cut the handle off of your tooth brush and stick your motor to the toothbrush head.
For more fun, slide two flashing LEDs for eyes on to each side of the battery under the tape (the long contact must be on the top of the battery).
Brill, flashy, buzzy fun! Enjoy!