This revolutionary seat lets babies sit up and join the action as soon as they have head control. The Bumbo baby seat's unique shape props a child to an upright sitting position, providing trunk control and lumbar support while securing the legs, to keep baby from sliding forward. No straps or fasteners are needed - the seat itself does all the work! Trusted by pediatricians and physical therapists, the Bumbo infant seat has become a fast favorite with kids and parents.