- an Etch A Sketch (quite obvious :-)
- electroluminescent foil with a corresponding inverter and battery pack
- aluminium bronze
- scotch tape (insulating and keeping aluminium inside
- hot glue (connecting glass & bottom of the EAS
It basically uses the aluminium powder as back electrode for the EL-foil (the original one is removed), which is then moved away with a brush at the top of the painting head inside the EAS.
Just remove the original powder inside the etch a sketch, insert aluminium powder instead. The put a brush/felt on top of the "writing head" of the etch-a-sketch and apply the EL foil behind the glas frame (the side with the removed electrode to the inner room, where the aluminium powder is, which will replace this back electrode).
Since the original housing locks a little bit destroyed, i later added a wooden box around it.
Hopefully the last picture will explain the building process sufficently.