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Cut the lid and flaps off of an egg carton first. Next, cut it straight down the middle so that you have two rows of egg cups. Set one of those strips aside for another project.  A 12 or 18-cup egg carton will work better than a  6-cup egg carton, otherwise you'll get a very short caterpillar. Use scissors to trim off any sharp corners from the cups so that they are nice and smooth. Let your imagination run wild! Paint spots or stripes on to it. Glue some pompoms down its back. Give it a goofy tongue, eyelashes, or a nose. Bend its antenna into a new shape. The possibilities are endless!

Summary:
Cut apart an egg carton into rows. Decorate the caterpillar further.