My son has always seemed more interested in listening to adult conversations than activities for kids. When he was seven he went with us to his dad's reunion with other former members of the Army Security Agency. These people were obviously high IQ types and very interesting to listen to. My son was on his best behavior the entire time because he was the only kid there and wanted to stay and listen to the stories these guys were telling. This was at an age when he was still very fidgety. He even went with us to an expensive restaurant with the ASA group and acted like an adult. Again, he knew if he acted up he would have to leave so he sat and listened to Vietnam vets (former ASA) tell their stories for a couple of hours.
If he was with a group of kids at that age he was bored and fidgety and acted like he wasn't listening when the adults in charge talked, but he always heard everything that was said. It just looked like he wasn't listening.