KMS Industries, Alexandria, VA, 1968.
(plastic, 1.75 inches;
directions are in the bottom)
Take the eight cubes out of the case and arrange them in a single 2x2x2 cube to make different patterns. The cubes have one of the colors red, blue, green, and white on each face. The card that is in the bottom of the cage challenges give a number of challenges, including making each face showing all four colors: