I love this idea- making windows with washi tape to liven up a blank wall. Plus you could draw pictures or maybe even cute out magazine pictures of space or like a fairy land or something and tape them down in the process.
washi tape. I love the bottom one, with the starburst design, best; I wish I could buy it in Germany. Too bad that the few times I find a place over here that sells any washi tape, they always have the boring ones, from the same manufacturer, and never this design.