Every explorer needs a guide; for your baby, it's their mouth
Your baby is now more active than before and is starting to control their movements. They will be eager to explore their environment, but haven’t yet got the skills to squeeze and poke with their fingers to learn about objects. However, their mouths are full of nerves that tell them if something is soft or hard, cold or hot, and more. This makes their mouth perfect for exploring themselves and objects.[1]