I have one each for my three older kids and we love them. I have found that all of them have taken a bit of time to get used to them and DD1 and DS1 now use them okay. Before they were about 2 and a half, they didn't like them that much and preferred a small swim ring. DD2 isn't really into hers yet, though we do give her a go with it for a few minutes every time we swim.