Related milestones

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

Turns head towards sound or voice

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

Moves legs and arms off of surface when excited

Able to bring hands to mouth

Able to move fists from closed to open

Quiets or smiles in response to sound or voice