Junior songsmith

My five-year-old nephew, inspired by some new kids band on Nickelodeon, has begun to write his own songs. So far he has written two:

Up, Down (Come In The Tree With Me) [paratheses mine]
When I Hide, I Cry

That second one sounds a little emo to me. Anyway, I'm trying to get him to write down the lyrics - because oh, there are lyrics - so that I can torture him with them when he's sixteen.

Update: My nephew has informed me that When I Hide, I Cry is a Spongebob "cover." Ha! The treehouse song, however, is all him.