With the setup for the Tic-Tac flashlight, the voltage produced by the magnet alone may not be enough to power up the LED. It is possible that the only reason the LED lit up was due to the rechargable battery not being completely empty in the first place. This theoretical experiment attempts to improve on the circuit based on one of the comments made on "Shake it like a Tic-Tac!"
Image taken from Shake it like a Tic-Tac! page.
Step 1: Parts Needed
Magnet 20 mm in Diameter x 1
470u Electrolytics x 2
White LED x 1
Magnet Wire x 300 ft
Ballpen case or some hollow cylindrical tube that can fit the magnets and accommodate the coils of wire