Well, you're first going to remove everything except The Lonely Island, especially S.E.X.
Then you're going to download good music.
Problem solved.
See, this is the music my 13-year old self listened to.
I actually had two ipods. One was one I got for free (1gb) and the other I bought for $50 at best buy.
I'd put legit, clean music like Nirvana on the free one, and everything else on the shuffle. I'd take both to school. If my mom asked to see my iPod, I gave her the clean one.
This is what my parents are like.