Swim Lessons (2-4 Year Olds)

Any recommendations of good places for swim lessons in Irvine (or nearby)?  Preferably where the teacher will work with the child in the water (vs. the parent as I think it is more effective with the parent watching).  Focus is really on getting them acclimated to the water / basic steps (2 year old) and being more water safe (3.5 year old)? 

Waterworks.
Heated indoor pools.

Personal opinion. I think they learn around 4/5 years old range, able to remember the lessons. 2/3 year olds remember when they take lessons but more likely to forget after long periods of not being in the pool, like during winter time.

When I was young, I took swimming lessons at the pool next to Irvine High School
I can't say I'm a good swimmer by any stretch, but I can float for a while if need be