One of my favorites at the Yayoi Kusama: Infinity Mirrors exhibit at the Cleveland Museum of Art was was The Obliteration Room.
It's a large room, all in white, with white furniture, toys, appliances and so on. Visitors are given some colorful round stickers and are encouraged to place them on anything in the room. So the pure white room will be "obliterated" with the colorful stickers that visitors place.
As an early visitor, there was still, plenty of white space. As the days and weeks progress, the room will be more and more covered in colorful stickers.
See photos and videos from the Yayoi Kusama: Infinity Mirrors exhibit.