Paint-by-numbers was a widespread fad in the 1950s. The sets came with paint and colorless pictures pre-printed on canvass. The images were divided into areas numbered to correspond to paint colors. You filled them in. Unfortunately, a production error in one of the first sets had armchair artists painting a green bull and a beige matador. Boy, did the manufacturer see red!

OOOH! I remember "paint by numbers"! I made a "Jesus at the well"....boy, what an UGLY THING that was! Times, I'm happy to say, have changed!