Milestones are a significant part of your baby’s journey and show you how well they are physically developing. Babies learn these new skills through everyday play, like crawling or sitting up on their own for example! Infants are not born knowing how to interact with people, but exposing your infant in the early stages of life will help them develop new skills. Infants need toys that can provide them sensory experiences and this helps make connections between things like shapes or colors later on down the line when they're older!