A lot of parents don't realize that their baby, all the skills that they have. So they can look at you, they can follow you. They're already starting to imitate you, and through the first few months of life, they're already starting to learn to reach and grasp toys, and to have nonverbal communication with you.
Early interventions for CP should be based on the strongest possible scientific evidence for benefit and should have the smallest possible risk of harm. In the US, early intervention (EI) is a system of services available under the age of 3, to support infants and toddlers with developmental problems and their families as they interact with and care for their child.