These were made by Ted Sears, Disney animator from 1931-58, and feature Sears, his wife Vee, and their daughter, Marcia. His IMDB bio states: "To amuse himself, Ted still drew for his friends and made props for the plays his daughter appeared in - he also produced his family's Christmas cards which employed his old love for trick photography an special effects - these holiday cards took months to prepare and were awaited with great anticipation by over three hundred recipients. (he lettered the envelopes individually, turning each name into calligraphy.)"

Via How