Please don't use waterwings (the ones that are not attached to the buoyant torso vest). They can *cause* drowning. The arms can go up over the head, and then the child cannot put their arms back down. Then the inflated part is up above the water, and the head is forced down.
I had just found this out (from the Dis, thank you Dis) and was ignoring it, thinking "pshaw, I'm always in arm's length from DS, it's OK". Not a week later, we were at my brother's in his pool, and I was talking with my brother. DS was in arm's length distance from me. Behind me.
Suddenly my brother is looking beyond me, with a really weird expression on his face. I turn, and DS (in arm's length) has his head under the water, arms above his head, 100% unable to get his body and face up because he couldn't reach the bottom and couldn't pull his arms down b/c of the inflatable wings.
The two steps it took me to get to my son, whose head was under the water, were the longest two steps in the history of the world.
Don't let kids wear waterwings. My brother and I learned to swim with them, but we were lucky. And the problem with luck is that it's not in our control when we will become UNlucky.
OH, and like most drowning cases, he was COMPLETELY SILENT. For those who don't know, drowning is silent. All of the person's (child or adult, doesn't matter) instincts are used in trying to just get the head up, and they don't flail noisily or yell or anything. They become pure animal at that point trying to save their lives, and they are silent.
So if it had just been me and my son, or if my brother didn't have perfect vision and didn't see DS from the far end of the pool, it could have been very very different in outcome and my family's world would have changed that day. (even though he doesn't read here, thank you brother, from the bottom of my heart)