A child seat for a vehicle seat with a protruding vehicle head rest includes a seat bottom for being supported on the vehicle seat, and a seat back carried by the seat bottom for providing back support to an occupant of the child seat. A recess is disposed in an upper end of the seat back and is positioned and adapted to receive the vehicle head rest and allow the vehicle head rest to protrude therethrough. Optionally, a supplemental head rest may be provided which is releasably securable in the recess.