Our almost-three year old has taken an interest in the pool, and I'm interested in techniques to teach him swimming fundamentals. I saw this question, which had some good tips, but I'm specifically interested in how I can teach some of these things effectively.
We've been working on things like kicking, lying on back, floating, etc., but not having a lot of luck because he doesn't really understand what we're trying to have him do. When we ask him to kick, he does, but he kicks straight down, for example; even when we try to show him how to kick properly to propel himself he doesn't go anywhere. (He's in a Type V life jacket much of the time, as he is most comfortable like that, but we've done it without a life jacket.)
What techniques are most effective at teaching swimming to a toddler/young preschooler?