A folding child booster seat having a frame portion and a seat portion. The frame portion includes foot hubs, seat hubs, and a set of pivoting support members joining the foot hubs and the seat hubs. The frame portion further includes a pair of seat back support members where each of the seat back support members is engaged to one of the foot hubs and is slideably engaged to one of the seat hubs. The pivoting support members includes front, rear, right side and left side pairs of pivoting support members. Stops on the seat back support members limit a sliding of the hubs that slideably engage the seat back support members to minimize an opening of the frame portion, and flexible members engaged between the foot hubs can further minimize an opening of the frame portion. The seat portion is engaged to two of the seat hubs and is further slideably engaged to the seat back support members. The foot hubs include disk portions for stability and the seat hubs include disk portions for pushing up the seat portion when the frame portion is collapsed.