I recorded my 2-year-old daughter playing as I attempted to get my stupid microphone to work. As a joke, I edited her wailings and based a short music track around them. At the end, you can hear the wailing unedited. I think she was actually singing, but normally her singing is less, uh, avant garde.
I think the track turned out all right, and if nothing else it makes me chuckle. But if it suddenly sounds really horrible to me after I wake up tomorrow, I'm going to take the video down and pretend it never happened.