marbit
n.— «General Mills will put Scooby imagery on 4 million Count Chocula cereal boxes, and will include Scooby, Mystery Machine, Shaggy and other character “marbits” in the product.» —“Scooby Dooby Two—Halloween promotion from Time Warner” by T.L. Stanley Brandweek June 28, 1999. (source: Double-Tongued Dictionary)