Juvenile vehicle seat with movable headrest

A juvenile vehicle seat comprising

• a seat bottom and
• a seat back including a backrest arranged to extend upwardly from the seat bottom and a movable headrest including a headrest cradle mounted for up-and-down movement on the backrest and a cradle-height controller linked to the headrest cradle and the backrest to control elevation of the headrest cradle above the seat bottom, wherein the movable headrest further includes a cradle cover coupled to the headrest cradle to move therewith relative to the backrest and an extensible cradle tail having an upper end coupled to the cradle cover to move therewith relative to the backrest and a lower end anchored to lie in a stationary position relative to the seat bottom and wherein the extensible cradle tail is expandable and contractible to change length during up-and-down movement of the headrest cradle relative to the backrest between a raised position located at a first distance from the seat bottom and a lowered position located at a relatively smaller second distance from the seat bottom so as to cover forward-facing openings formed in the backrest and located behind the extensible cradle tail and between the seat bottom and the headrest cradle in the raised position.