When moisture condenses and freezes on a window, some say that Jack Frost has stopped by, leaving the lacy pattern as a souvenir. Grace your panes with paper snowflakes, attaching them with poster putty. Or make a wreath of snowflakes by sticking them one at a time to a wall with poster putty. Kids can happily occupy themselves cutting out dozens of paper snowflakes. Then adults can step in with thread and tape, and together you can watch your family's own gentle blizzard materialize.