How many of us have warm memories of spending a lazy summer afternoon outside just laying in the grass and watching the clouds in the sky for familiar shapes? Whales and bears and gorillas and hands giving a thumbs up would float on by, all white and fluffy and very much just clouds. But it was fun to dream, wasn't it?
Well, why should that just be for clouds? You can find familiar shapes in all sorts of things. Just look at all the stuff folks have found that look like they have faces! You could probably invent a whole host of characters to go along with them.