There are many benefits of introducing your child to swimming whilst they're still a baby, including improved physical development as well as social development not to mention fun! However, the benefit that is overlooked most often is that of cognition or mental benefits which are incredibly important for the development of children as a whole.
Often students learning a new motor skill, like swimming, experience a sudden lack of progress after a very strong start. This can be because of something called the 'learning plateau'. This term describes the way in which a period of rapid skill acquisition can be followed by a prolonged 'dry spell' during which no discernible progress is visible.