DC are good swimmers though not used to swimming in the sea. Sea quite a long way out and adults sat up the other end of the beach - so DC in sight but as the beach is busy it is hard to keep track of them. Children swimming properly (not just paddling) with body boards etc - though they've been told not to go out of their depth.
What age would you let them do this?
I'm intrigued as me and my friend clearly had totally different expectations about this on Saturday - despite my DC being the stronger swimmers.