Do what my parents use to do with me and my 2 brothers go where you want to go and send the kids where they want to go then meet up at the end of the day. I was what 10, and I was running around Epcot by myself, or Magic Kingdom while my parents were at Epcot. We all came back together at the end of the day at Mexico to what Illuminations.
I would say IOA, I mean IOA does have that rep as a "Teenage Park"