For each caterpillar you will need:
2 melon balls
2 whole cloves
Spear the two melon balls and the grape (or three melon ball, or three grapes, your choice!). Push the pointed end of the cloves into the "head" to form antennas. Serve on a lettuce bed - or try a bed of sprouts!
Eat the little bug'gers!
(Sorry, couldn't resist.)