Social and Emotional	Smiles spontaneously, especially at people Likes to play with people and might cry when playing stops Copies some movements and facial expressions, like smiling or frowning
Language/Communication	Begins to babble Babbles with expression and copies sounds he hears Cries in different ways to show hunger, pain, or being tired
Cognitive (learning, thinking, problem-solving)	Lets you know if he is happy or sad Responds to affection Reaches for toy with one hand Uses hands and eyes together, such as seeing a toy and reaching for it Follows moving things with eyes from side to side Watches faces closely Recognizes familiar people and things at a distance
Movement/Physical Development	Holds head steady, unsupported Pushes down on legs when feet are on a hard surface May be able to roll over from tummy to back Can hold a toy and shake it and swing at dangling toys Brings hands to mouth When lying on stomach, pushes up to elbows
Causes for Concern	Doesn’t watch things as they move Doesn’t smile at people Can’t hold head steady Doesn’t coo or make sounds Doesn’t bring things to mouth Doesn’t push down with legs when feet are placed on a hard surface Has trouble moving one or both eyes in all directions
Developmental Checklists	4 Month Old Checklist (English) 4 Month Old Checklist (Spanish)