I have a binder filled with Cubs stickers and stamps. Sets inside include Grenada and St. Vincent Stamps, Eureka, Fleer Stamps, Fleer Stickers, Red Foley, Panini, Pro Stamps, Publications International, Topps stamps and Topps stickers.
Recently I happened upon a yet-unseen-to-me set of sticker stamps. It was a simple set of just two Cubs, but it sent me down a crazy rabbit hole that led me to gold cards, colorized coins, and two different sets of cards.
I bought the entire package as it was cheaper than getting the individual Cubs I could find. Inside the package was a sheet with nine cards that needed to be punched out. A second sheet had sticker stamps that get affixed to the cards.