Foldable child seat

A foldable child seat adapted to be secured on a vehicle seat, has a frame comprising a base structure (20), a backrest structure (34) pivotally mounted on the base structure (20) for angular movement between a deployed position projecting upwardly from a rear edge of the base structure (20) and a stowed position in overlapping abutment with the base structure (20), and a support structure (60) pivotally mounted on the base structure (20) for angular movement between a first position in substantially parallel overlapping relation to the base structure (20) and a second position in which it projects upwardly from the opposite end of the base structure (20) to the backrest structure (34).