This reminds me of 'fairy doors' I've seen before- usually popular with young girls to have in their room. Very cute! Also kinda reminds me of somewhere I read that in the house of the creator of Waldo- there is a tiny Waldo painted somewhere out of the ordinary. I'm not sure if it's true- but I remember reading something about that as a kid..
gotta be careful with fairy doors though, sometimes they work ;)