It has been a while since I last looked at Blik (large adhesive (and removable) graphics for your walls) and look! they’ve got new stuff – including space invaders like designs, prose (whoa, pricey), minis for glasses and notebooks and stuff (dishwasher safe). Nice. I also like the clouds.
For more childlike designs go see Wallcandy Arts, they have animals and aliens, but they also have red and blue Unikko designs (it’s Flash, so no direct link). You can also play with the create a room stuff.