Related milestones
Moves legs and arms off of surface when excited

While lying on back, attempts to reach for a toy held above their chest

Quiets or smiles in response to sound or voice

While lying on back, keeps head centered to watch faces or toys

While lying on back, visually tracks a moving toy from side to side

Enjoys a variety of movements (at 0-3 months)

Turns head towards sound or voice

Shows interest in faces

Makes eye contact

Coos and smiles
