Smiling, tracking faces, responding to voices. Start tummy time from day 1.
Rolling, reaching for objects, babbling. Signs of weaning readiness appear.
Sitting independently, object permanence, stranger anxiety, first words.
Pulling to stand, cruising, pincer grasp, first steps may begin.
Walking, first words becoming sentences, pointing, feeding themselves.
Running, 2-word phrases, following 2-step instructions, imaginative play.