Get the JAM Paper 5" x 7" Front Imprint House Scene Blank Cards & Matching Envelopes Set, 25ct. at Michaels.com. Well, how about you start making up your own lines instead? Christmas card sets with blank insides to write on, draw on, or decorate on! If you're the creative type who loves to write messages or decorate the inside of your cards, then these card sets are perfect for you.