Related abilities

Enjoys playful interactions with others (such as peek-a-boo)

Is vocalizing in response to playful interactions

Is able to play on tummy for longer periods of time

Is able to push up onto forearms and straight arms during Tummy Time

Is usually happy when not hungry or tired (4-6 months)

Is not upset with everyday sounds (4-6 months)

Does not demonstrate frequent or long bouts of being upset (4-6 months)