Abstract: An auxiliary seat for young children, particularly for use with children having physical disabilities, is removably connected to the bowl of a toilet. The seat base is a rear-facing horseshoe shape, with upstanding arms and back support. The auxiliary seat provides postural support, by way of contoured sitting surfaces, a deep contoured anterior support. The anterior trunk support is pivotally connected across the front of the seat, to support the trunk and forearms of the user. A separate, adjustable height footrest is provided, the seat having restraint straps that may be individually applied about the knees of the user. A flexible urine deflector is removably insertable at the front of the seat.