about 2yrs we started to leave DS alone for a few mins or so, to get a towell or something , i usually have the water very low and he has a million toys to keep him occupied . DS hates his head under water , so i know he wouldnt pourpusly put his head under.

DD is a water lover (12mths) and often puts her head under water deliberatly , so i never ever leave her alone in the bath .

they both bath together, DD comes out first and i go to dry her off , while DS is unsupervsed . if its quiet i often run in panic , but DS is just concentrating on something important to him (cleaning matchbox cars with a toothbrush )

dds room is right next to the bath room so i can hear ds easily . or i wait till DH gets home so he can bath and i can supervise if he needs to get towells or something .