>>6549350you can see the assembly here:
>>6549107parts were bought on local radio market - a few LEDs (to chose which will suit the best), battery box for 1 battery (but 3V to save space instead of using 2 1,5 V batteries), on/off switch and an old wire I found. All smelted together or glued (battery box and switch are glued to cropped plastic card piece). shortest axle was split in two and glued underneath.
This assembly fits in Toa'a body piece and still allows gears to work.