When discussing art galleries in class, it made me think of an artist i was exposed to in another class. His name is Chris Burden. The reason I bring him up is because he creates great interactive pieces of artwork. For example he sets up interactive art work in galleries which visitors contribute to. For example he created this contraption which is attached to the exterior walls of the space and when a visitor passes by the device the wall expands. He does very neat and creative pieces similar to this which truly are creative and brilliant.
Read a little and research more if you like this. http://en.wikipedia.org/wiki/Chris_Burden