Hay, I really think the swimming lessons for under 1's are just water play, KWIM?? We took the twins and found it a bit of a waste of money, we did 1 term, then quit and took them swimming ourselves once a week and just had fun, ( much better, cost less and we stayed in for more than 1/2 hr) Rianna started at 1 and I wont start Dion til 1, by then they can participate in a lot more things ( humpty dumptys etc)
Anyway that is only my opinion, see how you go!

Kate, good that you have an AC house to go to ( and always nice to catch up with our dads!!) I am home with my AC on and the littlies, the big girls with my sister and DH at work.