We had an alternate circuit Krishna had seen on the net and I had corrected could potentially be a constant current circuit which seemed quite preferable for longer lifetime as well as protection for the LEDs for any odd over-voltages.
I had to split the board into two pieces; one for the leds in the top and another for the circuit which was to be inside. We also wanted to change the switch to something that didn’t need to be pressed as long as light was needed. Ultimately, it turned out to be a bit of a squeeze, but we managed to put it together and get the kids excited all about it.
More than the kids though Krishna seemed very excited and carried the torch everywhere for the next few days :).