Give plain pumpkins a flowery disposition. Begin carving as you would with a jack-o'-lantern. Carefully cut a lid (keep the stem) and remove the seeds and pulp. Using a drill or nail, make holes just wide enough for the flower stems. Cut the mums' stems about a half inch from the flower head and poke the stems into the holes. Keep the inside of the pumpkin moist; flowers will last two or three days.