As a previous poster mentioned, on the Magic they now have the 11-13 age group in Ocean Quest, so no little kids there. This group did also have scheduled time in the Stack, the Lab and I think they even invaded the Club (I bet even the 11-13 YOs wanted to drive the pirate ship!)
On the Wonder, I believe the Oceaneer's Lab has 2 age groups: 8-9 and 10-12. So he wouldn't be in a group with "little" kids - most the kids would be within a year or two of his age. They schedule age appropriate activities for each group, and the Lab also has a *bunch* of computers, as well as Wii systems, games and other things to keep kids busy who don't want to participate in the current activity.
Amanda