Hello,<br />First, I am really new to boating, and infact just purchased my boat in April. Anyhow, we just got a tube for behind to pull the kids on. They are really young (9 and 7), so we bought a 2 person and my wife will ride with them (I don't like that sort of thing). My question is at what water temperature do you think it is safe for them to do this wearing only a bathing suit and lifejackets? I think that it should be 65 min. They potential is there for them to go into the water, and be there for up to 5 minutes. Just looking for some opinions.