Black plastic from bunnings. Use painters tape to attach to the walls. And write on it with highlighted markers. I went to a few in my young adult life also glow sticks heaps of them.
You can get tubes of 50 glow sticks from the Reject Shop for quite cheap - a few dollars I think. They have connectors that you can use to click them together and make shapes and things - awesome. Buy a few tubes as I found not all of the sticks in each tube worked.
Bookmarks