Magic whiteboard magic blackout blind 10 x a1 perforated sheets on a roll magic blackout blind can be safely applied to normal single glazed or double glazed windows the type you would find in a house or office magic blackout blind helps everyone sleep stops children waking at dawn due to sunshine and helps children get to sleep when it is still light at bedtime the magic blackout blind helps children and parents get a good nights sleepthe temporary window blackout blind covering thats