L.N.
**Edit**
Hi all~ I usually do not contradict other moms' adivce b/c it is not my place, Im no expert. But I have to say please, please, please DO NOT put your kids in an inflatable ring. They are SOOOO dangerous b/c they can flip over, trapping your kiddo upside down...I've seen it happen too many times. There are safer devices for learning to swim. I Don't mean to offend, after all we are all on here to be better moms, right?
Hi K.~
I am certainly no expert, but I would say it depends on if you are talking lake or pool. Sounds like a silly question, but we bought a vest for our son (3yrs) because he wouldn't trust the arm floaties. I found a GREAT 'vest' at ToysRUs that looks more like a front and back kickboard. It goes over his head and has elastic on the sides, as well as an adjustable strap through the crotch. The 'boards' are adjustable too depending on thier swimming abilities. Of course as soon as I bought it, he decided to start swimming WITH the floaties...go figure! I have no idea if this vest is appropriate for actual lifesaving or boating...our intention was poolside. Good Luck!
~L.