What kind of "performing arts" activities can I do with older kids who are completely uninterested?

[jllybeanie]

I'm the performing arts specialist at a summer camp and with the younger kids, it's great. They love dancing around, learning songs and playing little theater games.
But the older kids are completely apathetic and don't even like to try the awesome improv games I have for older kids. I have some games that don't really involve acting and are just kind of focus games that some of the older kids like, but sometimes I have groups of only 2 kids, and I can't think of a good way to get such a small group of uninterested kids involved. I tried just plain charades, but it was excruciating-- they just didn't want to do it. Any ideas you may have will be greatly appreciated! Thanks!