### Front: A bold illustration of the Grinch wearing a Santa hat, smirking mischievously. Above the Grinch, it says "Resting Grinch Face" in a playful font. ### Back: A fun quote from the Grinch, like "Maybe Christmas, he thought, doesn't come from a store." Below the quote, a small, red heart symbolizes the Grinch's heart growing three sizes. To add some extra flair, you could use a mix of traditional Christmas colors with hints of the Grinch's iconic green. Maybe even add some glitter or metallic accents for that festive touch! What do you think? Would you like any other festive ideas?