NO SEW DIY LAP DESK Materials: basic tray from any dollar store, thick piece of Styrofoam cut to size, an old pillowcase, stuffing, straight pins, and industrial glue. Instructions: Take your Styrofoam, place it face down, put stuffing on top, then wrap the Styrofoam with an old pillow case . Stick pin the pillow case firmly into place. Then put industrial glue on the back of the tray and glue the Styrofoam board to the bottom of the tray. Allow to dry overnight and decorate desk.