Not only is this okay, but parents should actively encourage this type of exploration, since this kind of manipulation allows babies to learn about sensations like texture, smell, and more, says Sarah Lytle, Ph.D., director of Outreach and Education at the Institute for Learning and Brain Sciences (I-LABS) at the University of Washington. At 3 months, your little one is exploring the world around him - and is often doing so with his mouth.
