I had mine in water (other than bath) from 6 weeks, and my nephew was the same. My brother and I both know how to teach swimming, but I'm not a swimming teacher, my brother is. My littlie was in lessons from 4 months, once a week, and in the pool with me everyday too. My nephew is 8 months old and can turn back to the side and grab the wall. He plays in the water which has taught him how to move by kicking and when to hold his breath.