Amused by the small things

As a kid, I thought these "helicopter" seeds were awesome. It was cool to watch them fall from the tree and whirl around til they reached the ground. Then I would pick them up and peel the brown part off to reveal the green seed.
Well this weekend I found one of these actually growing in my new patch of grass. I was fascinated. I've never seen one actually growing like that... a tree growing right out of the helicopter. That's just what they're supposed to do. Cool huh?
I still pulled it out because I don't want a tree growing right next to my new fence. And then I took this picture.