Any older kids with heart problems?

Hi! I'm 15 and I have been working with the president of a non-profit organization that provides support for people affected by congenital heart disease in Houston, Texas, to start up a teen support group. It's going to be non-profit too. I was wondering if any older (12 - 20) CHD kids could give me some advice as to what events you would like to participate in. Right now, the 'mother' group is partnered with the Houston Zoo and Children's Museum, among others, and so we have events there where our admission is free! I am trying to think of places that older kids would like to go. Any suggestions?