Related milestones

Uses both hands to explore toys

Notices toys that make sounds

Is not upset by everyday sounds

Reaches for toys while on tummy

While lying on back, transfers toy from hand to the other

Generally happy when not hungry or tired

Brings hands and objects to mouth

Able to calm with rocking, touching, and gentle sounds (at 4-6 months)

Enjoys a variety of movements (at 4-6 months)