This sugary caterpillar is more about the decoration than anything else; really, it's a trail of cupcakes set up in a curvy line. Bake a batch of cupcakes in the birthday boy or girl's favorite flavor(s) and allow them to cool completely before decorating. About six cupcakes make a good body, single file.
If you're baking for multiple guests, double the number or make double the amount in mini cupcakes instead. Another alternative: Use a small sheet cake as the head of the caterpillar instead of a cupcake.
Decoration ideas include small, cut pieces of licorice string to use as the legs, feet and antennae and gumballs, M&Ms or chocolate chips for eyes.