Anybody recognize these? They are iron-on transfers featuring Underdog and Dudley Do-Right characters. The round ones are about 2-1/2" diameter and the othes are 1-3/4"x2-3/4". Probably a bit newer than the usual fare on here, but I'm having some trouble figuring these out. Are they a cereal insert? Are there more in the series? Any help would be appreciated. Thanks!