This gown is so simple to make, and the possibilities are unlimited: camouflage, princess, bling, sports, trains, Elmo, Christmas, Easter, etc. A child in the hospital is an awful thing, so anything you can do to make them feel better is worth doing.
Begin by cutting out the fabric pieces. Use the shape of a basic V-neck, with extra hem length. The picture shown is for a toddler-sized gown and can be enlarged as needed. You should cut out one front piece, two back pieces that mirror each other, and one front pocket.