I should mention that I demonstrate with each children how their father/Priesthood holder will place their hands during the prayer, cover their nose and dip them like they are going under the water. It's fun to practise and the children really love this when it is their turn. You can also ask a Priesthood holder to come and demonstrate this for you. I just find it easier to do it without having to find someone to come during that part of the lesson - do what is best for you.
Jesus Christ is baptized from the February 2013 Friend here:
Coloring page from June 2007 Friend here: