Club Penguin had wallpapers (also known as desktop backgrounds) on their website that you could download to set as your desktop wallpaper. There were 111 wallpapers available for download such as the Sport Shop, the St. Patrick's Day, the Puffle Party or the famous CPIP wallpaper.
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These were desktop wallpapers as seen on the computers inside the Everyday Phoning Facility. They were a basic/non-detailed form of four actual wallpapers that are listed in the above section. They were not downloadable wallpapers from Club Penguin's site, simply images found in-game.