Interactive gallery

Tatiana's (this is probably misspelled and I apologize) presentation made me think of an idea that is probably way outside of the realm of possible, an interactive giant light-bright in the gallery. How fun would it be to allow people to come into the gallery and make their own picture. Or even better (sorry, I am literally thinking as I type) the space is lit with black lights and portions of the wall are covered with black boards where people can draw or write anything (obviously regularly monitored because people can be inappropriate. Or hey short of hate speech let whatever remain on display, this isn't elementary school) using neon gel pens.