This is an easy pattern. Circles are easy to crochet in general in simple dc, sc, etc.: just keep increasing groupings one more stitch farther apart for each and every new row and the circle should lay flat even if you keep going like that for forever.
Paper Diapers: All you need is a package of napkins (your choice of color) and the appopriate amount of safety pins. SO easy the size according to what you are going to serve in them. These also make awesome party favor bags!