Tip for Learning the Lyrics to Kids' Songs

I don't know about your kids, but Alex loves the songs from the shows he sees on TV. Thus far, I've learned the full lyrics to a half dozen Wiggles songs, the chorus to another dozen or so Wiggles songs, a few verses to various Sesame Street songs, and the opening theme to Bob the Builder. All too often, Alex will ask me to sing a song I don't know the lyrics to, but I've figured out an easy way to learn them. I had activated the closed captioning on the TV so I could watch while he was sleeping, and had left it on when we turned on the Bob the Builder movie, Built to Be Wild. The songs in it are actually pretty good, and the closed captioning functioning showed the lyrics just as if we were at a karaoke bar. Now I can learn the words that I couldn't make out to sing to Alex (and hear the whole song in my head instead of just the chorus when I go to bed!).