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.
A weekly swimming lesson is often a childs first social experience out of the home that involves their peers. They learn to relate and interact with each other and look forward to seeing their classmates each week, and even watch them for cues when it comes to taking risks and learning something new. The best way for babies to learn is by example, and as they are with children their own age, a lot of fun goes along with it.