These cards were created with the Create a Critter cartridge using the Cricut Expression. I keep a shoe box with leftover paper scraps. All the papers used came out of that shoe box. Each card unfolds to display the "Happy Birthday" sentiment also cut from the Create a Critter cartridge on the Cricut. The cards fit nicely in an A2 envelope. I know my niece and nephew, Elizabeth and Elijah, will love these cards when they receive them!