My sister used to babysit these two kids we know. For the past few years tho, we have been taking them out to lunch/dinner sometimes just to play.
Yesterday they came over and the older boy (he is 8) played Guitar Hero. It was so cute! He could only play on the beginner level where you only strum, but he loved it. And he knew some of the songs. He and his 5 year old sister got really excited about "One Way or Another" by Blondie. They both started singing it before he even played it.