Anonymous wrote:There is a big difference between water familiarization and swimming. The activities described are great fun and provide important building blocks. For actual swimming, though, get professional instruction. Many people know how to “swim,” but their technique is poor and inefficient.
Also, “drownproofing” and water safety/self rescue are extremely important.
Eh, I don't see why this is relevant. The kids are 4 and 5. The OP probably just wants them to start to learn how to do the basics. In a few years, if they want to be competitive swimmers, they can take lessons and/or join a team. You don't need to have professional instruction to learn how to run, and yet we all do it. Once you get into competitive track and field, you start to learn techniques and specific skills. Swimming is the same way. Let the kids have fun and learn at their own pace. You should be supervising even once they learn to swim, so it's not a drowning risk either way.