Can't decide on a look for your jack-o'-lantern? Make a few sets of tack-on features, and you'll be able to change its face as frequently as you change your mind.
To make the mix-and-match parts, use a permanent marker to draw eyes, noses, mouths, and other facial features onto adhesive-backed felt. Cut out the shapes, then use them as templates to cut matching shapes from cereal-box cardboard.
Press flat thumbtacks through the cardboard pieces, then stick on the matching pieces of adhesive felt.
For ears that stick out, omit the tack and sandwich half a toothpick between the felt and cardboard.