Need to move DD to travel cot in front room for a month or so. She's used to the very dark bedroom (thick curtains and blackout linings PLUS blackout blinds) and I expect she'll wake horribly early in the front room which has purely decorative curtains. What would be a good, cheap way of cutting the light out? Doesn't matter if it's fairly ugly as long as it's really easy to hook up and take down, so that we can return the front room to a visitor-friendly state in the daytime.
All ideas gratefully received