I like the tree face but I'm very eager to know if this is actually owned by the person who submitted it, or if they just found it one day on a walk somewhere.

The rainbow unicorn has obviously been around a while since it too is sporting a little bit of dust. And I will assume that is because it is much loved by its creator or by the recipient if it was a gift. I also like the face within a face and that it has a butt face as well, which is probably a cloud if it's not a fart. I vote for unicorn.