Rattles are are not just a source of entertainment for a baby to play with. They can help to teach babies many new skills. When parents hold a rattle up, babies might first look at the rattle with their eyes. If a parent moves the rattle from one side to to the other, babies learn to visually track, or coordinate their eyes together to watch a moving toy. The advantages of giving your babies these rattle toys are not only limited to their visual development, but also their motor skills, their curiosity and aids in the development of their brain function too!