I also have an 11 year old who is not a rider. We went to IOA over Thanksgiving and the only things he rode were a spinning ride (ioa's version of Disney's teacups), Spiderman (which really scared him), Red Fish Blue Fish (Disney's Dumbo), the carousel, and The Cat in the Hat (Disney's Winnie the Pooh). There is a dinosaur playground that he really loved. We probably spent an hour letting all the kids and some of the adults play.
The rest of the family are ride enthusiasts! We will ride anything, anytime, anyplace and we had one of the best days of our lives! We stayed on site and had keys that let us go straight to the front of the line. So we were able to ride everything multiple times! It was fantastic!
We had eight people in our party, and only four room keys, so my 11 year old never felt pressure to ride anything he didn't want to. He would just stay with whatever group was waiting.
Hope this helps.
Disneyfan741