I was very impressed with the Yamaha PSR-K1, which not only displays the lyrics from a midi file but the lead notation with it in real time. The midi files that come with it are pretty cool, and of course it comes with a mic and vocal effects for sing-along entertainment. While this could easily turn into a play toy with it's no-mistake Performance Assistant, the K1 also has the potential to get someone started in music theory. For a low-cost starter/entertainment keyboard, I like it. I think my wife secretly wants one.