Child seat system

A child seat system, comprising at least one first seat element, at least one second seat element and one base, which can be attached to a vehicle seat,

• wherein the base has a plinth element and a rotary element,
• wherein at least the rotary element has at least one fastening device for fastening the at least one first seat element,
• wherein the rotary element is rotatably arranged on the plinth element in such a manner that the rotary element together with the at least one first seat element is rotatable with respect to the plinth element in order to change an orientation of the at least one first seat element,
• wherein the at least one first seat element is removable from the base,
• wherein the at least one first and/or the at least one second seat element is/are adjustable with respect to the base or the plinth element of the base, in particular is/are rotatable from a first orientation into a second orientation, which deviates from the first orientation,
• wherein a manual operating device for at least one locking device for releasing and/or locking an adjustment, in particular the rotation is accessible, if the at least one second seat element is mounted on the base, but is not accessible, if the at least one first seat element is mounted on the base, and/or
• wherein the at least one locking device for releasing and/or locking the adjustment, in particular rotation is provided, which is operated by the at least one first seat element, in particular by changing an inclination of the at least one first seat element, but not by the at least one second seat element, in particular not by changing an inclination of the at least one second seat element, which potentially cannot be modified regarding its inclination.