Generally I leave the kids in the bath to do stuff like get their jammies, and tidy up from dinner. I check on them every few mins, call out to them and can hear them all the time. But they are all together and I know DD and DS1 will call out if DS2 is being a monkey or if they're annoying each other. Now that they're getting so much bigger, and our bath is practically a basin, 3 in the bath is a bit squishy! I think I will ask her every day if she wants to bath or shower alone or not now. She does enjoy playing around and having a bath with the boys but tonight I let her bathe alone and she was in there for AGES! Just talking to her toys and lolling about int he water. I know I really love my alone time in the bath, I imagine she does too!