Related abilities

Is interested in interacting with others, e.g. peek-a-boo (10-12 months)

Points to objects of interest (10-12 months)

Is able to sit unsupported and turn head to look at objects without losing balance

Has grown accustomed to everyday sounds and is usually not startled by them (10-12 months)

Is generally happy when not hungry or tired (10-12 months)