My DD, 6, has recently requested to take a bath alone. Usually bath time is her and her brother, 2. I'm not 100% comfortable because of the drowning risk but at the same time I don't want to discourage her independance. Our Bathroom is right next to our lounge so I have compromised tonight telling her ok but the door is to be left open so we can occasionally pop our heads round. What age do you think is appropriate to bathe alone?