Abstract: A combination shopping cart seat cushion and diaper bag includes a substantially rectangular seat panel with foldable front, back and two side panels depending therefrom. A foldable top panel depends from the back panel. The panels may be folded from a flat position to form a box shaped diaper bag. The front panel may be folded downward and the top panel may be folded over a shopping cart seat backrest to form a shopping cart seat cushion. An accessory panel may be removably attached to either the top or the back panels using velcro strips or other suitable attachment means. A seat/diaper changing cushion may be removably attached to the upper surface of the seat panel when the device is being used as a shopping cart seat cushion providing additional comfort to a child sitting therein. An elongated, tublar shopping cart handle cover is also provided having a longitudinal slit for slipping the cover over a shopping cart handle and a longitudinal bore therethrough for receiving said shopping cart handle.