yeh she has been swimming a few times but we haven't ever dunked her completly till yesterday.. It is really nervy at first but you just go ok on 3 we go under the water and you count 1 2 3 and go under.. Sometimes they splutter to begin with but they are fine. Or you can bob up and down and slowly take them under.. like go to his neck first then to his chin then his lip then his mouth and so on