Em has a bath seat we use now as he has excellent head support and is starting to sit unaided but for the past few months I have been filling the bath so I can lay him on his back and the water comes maybe half way up his head. He loves the freedom of not being held and kicks and splashes around and the best part is I don't have to hold him!! Its made bath time so much fun as I really dreaded it having to support him for the whole time he was in there.