The American Academy of Pediatrics now says it's fine to enroll children under four in swim classes. In fact, even kids as young as one could benefit.
A few years ago, the same group said swim classes might be dangerous by giving toddlers and parents a false sense of security. But a few small studies suggest toddlers may be less likely to drown if they've had lessons.
However, the group is not recommending classes for every young child.