We've at last got into a bit of a routine of taking DS - 21mths- swimming on a Saturday morning - he's outgrowing the yellow chair float thing he had and he's ready for something that gets you in the water a bit more - whats the best kind of float(s) to get - armbands? a float suit?? - want something that will encourage him to develop his swimming skills while making him feel secure - any advice very welcome.