US News & World Report

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A worker at the Just Born factory in Bethlehem, Pa., keeps an eye on the marshmallow Peeps that pass by on the conveyor belt on April 2, 2003.

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Marshmallow sits heated in a pot before it is run through the pressing machine to form marshmallow Peeps at the Just Born factory on March 12, 2004, in Bethlehem, Pa.

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Peeps have their eyes imprinted at Just Born on March 12, 2004, in Bethlehem, Pa.

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Hundreds of marshmallow Peeps sit on a layer of blue sugar as they move down the conveyor belt at Just Born, Inc. in Bethlehem, Pa., on March 29, 2013.

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A girl and her mother look at plush Peep merchandise at the Peeps & Company Store at the National Harbor in Oxon Hill, Md., on Dec. 9, 2009.

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Peeps move through the manufacturing process before they are given their sugar coating and eyes at the Just Born factory in Bethlehem, Pa., on Feb. 13, 2013.