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.
WC Toilet sign hama perler beads by powerrikke
Soot ball Totoro perler bead pattern
37 Radically Rude Cross-Stitches
Rude cross stitch hah
Good morning Mr. fox