Metal Shades in the bunkhouse- options to replace?

My 2 year old daughter LOVES playing with the blinds in her bunk bed and looking outside instead of sleeping. We have her where the emergency exit window is. The windows already have 20% tint from the factory. I just cut a piece of Reflectix to perfectly fit in the window and installed it between the full screen and the window itself. It is now pitch black in her bunk and she cannot look outside and be distracted during bed time or nap time.