Flat Keychain Blind Bags Set - 3 Pack Mystery Bags Bundle with Collectible Flat Charms Featuring , My Melody, Kuromi, More | Party Favors. This party favor set includes 3 blind bags, each containing 1 flat keychain of characters in a variety of fun poses. The characters include: Pompompurin, , My Melody, Kuromi, Marroncream, and Cinnamoroll.