Disassembly of a LED sword toy

One of the kids toys stopped working, and rather than just throw it out, we spent some time taking it apart to see how it worked.  Not sure where this particular sword came from, but if memory serves, this came from an amusement park (one of those carts of gadgets they push around at night, this thing probably set us back 20 bucks).

There were only a few screws holding everything together, and after things were apart, it was easy to see the problem.  Seems one of the cheap batteries failed/leaked, and melted some of the wiring. Pulling everything out of the plastic casing, stripping a few wires and connecting it to the lab power supply (+5v), the LEDs still worked - perhaps we'll keep them and make something else out of this small kit.   The toy contained 5 LEDs, 100uF capacitor, push button, and a small PCB (powered by 3 AA batteries).

See below for pictures...