For boys, consider buying the High School Musical dance mat that interacts with your television like a video game, or perhaps the HSM Karaoke set if he is involved in the arts or is always wandering the house singing the movie's songs.
Many dance games on the Wii use the controllers to detect your movement, or sync with the Balance Board; others use a special dance mat that utilizes arrows for you to follow.
In the DDR series, developed by Konami, you follow arrows to the top of the screen and tap the corresponding arrow on the dance mat when it hits the Target Zone.
So you have the dance mat and the game, but are you still wondering, "How do you play Wii Dance Revolution"?
After you assimilate your dance mat to the Wii (the same way you do the remotes and the Balance Board), insert your disc and click past the title to get to the main menu.