Okay, this year I just realized that my classroom is really...BLAND. I have stuff on the walls and colorful bulletin boards but it's missing something. I have an older classroom with the wall heater and window unit for the AC. The walls are this beige color and I have some furniture that can't be moved, like two open shelves. The room isn't very big and the door is like a prison gray. I'm in desperate need of ANY ideas that anyone may have on how to make my room POP, SPARKLE AND SHINE

Pretty please with sugar on top!
Thank you