Abstract: A modular pediatric seating system is provided for supporting a disabled person, and preferably, but not exclusively, a child. The system comprises an articulated frame having a seat frame section, a back support frame section and a leg support frame section. At least the back and leg support frame sections have interconnecting slots disposed longitudinally within the frame sections. Articulated connectors are also provided to interconnect the frame sections together through the interconnecting slots permitting spacing of opposed ends of the sections and replacement of one or more of the frame sections to modify one or more dimensions of the seating system. Platforms are connected to further attachment slots of at least the back and leg support frame sections to permit displaceable positioning and securement of the platforms to the support frame sections.