My favorite excursion in St Thomas is the Doubloon Sail and Snorkel. The crew is fantastic and great with kids. We did it for the first time when my son was 6 and had never snorkeled before. He had a blast.
I haven't looked at where we are docking in St Thomas but it's really not a long walk to the sky ride if you wanted to do that on your own. I believe the price is better that way.
On
Castaway Cay the stingray excursion is fun. We like to do the first one of the day as the rays are very happy to see people

That's another one we did for the first time when my son was 6.
I wish we had booked early enough to have a shot at a Cabana - definitely $ well spent. Maybe someone will cancel last minute and we can get one

fingers crossed.
I usually eat at the adult beach on CC so not sure exactly what is offered at the family beach. I believe there are burgers and maybe grilled chicken?? Also, there is plenty of fresh fruit and soft serve ice cream.
Getting so excited