Your lucky correspondent may go to pieces when they open the day's mail to discover a puzzle, a bouquet of flowers, and a greeting card…all in one envelope! Here's how a Greeting Card Puzzle works: The 60-piece, 5½"x7½" puzzle arrives to you assembled. Flip it over, write your personal message on the back, then break the pieces apart and tuck them into the included envelope. Finally, pop it in the mail to someone you know who will be delighted to "solve" the puzzle of your ingenious greeting! Choose from two colorful floral designs: Hi (blue background) and XOXO (pink background). Extra postage required.