Some adults don't know how to swim, are you one that knows how to swim? When did you learn how to swim? I remember taking lessons when I was 9 years old, I know that seems like it's a bit too old for a child to learn how to swim since most children learn when they're infants. My sister also took lessons at the same time and she is two years younger than me. I wish we could have a above ground pool at my house but I live on top of a hill so there's really no good place to have one unfortunately.