We've recently moved house and after gutting the downstairs we've run out of money to buy things like new curtains. I want to get my baby daughter used to what will be her bedroom by having some of her nap times in there but the curtains are awful and let so much light in they're hardly worth having! Until we can get some proper blackout curtains does anyone have any tips for blacking out the window (it is quite a small window) on the cheap?