Lucky charms hidden keys I remember when these came out I think , it was around 2005-ish : r/nostalgia
Chocolate Lucky Charms by Lahmom2000 on DeviantArt
Lucky Charms - real product for Wacky Packages Unlucky Charms
Boxes of Cheerios and Lucky Charms breakfast cereals line the shelves, Wednesday, Sept. 21, 2005, at the 10th Avenue Gourmet Deli in New York. General Mills, a company taht produces breakfast cereals