Thanks! Yes, there were definitely lots of kids there. I saw lots of kids just having fun playing in the sand as well as swimming in the grand reef (assuming your kids aren't freaked out by the idea of swimming with fish & rays).
There were a few photos at the beginning of my trip report that were taken with my Nikon DSLR but after breakfast, I put it in a locker and used the waterproof camera for the rest of the day. It wasn't a disposable, it was a Fuji FinePix (I think they are around $200). I wanted something that would shoot video as well as take photos and it did a pretty good job. I think
Walmart has some cheaper waterproof camera options ($50 to $70 range) if you're looking for something cheaper but a step up from a disposable.