Kellogg's Cereal Advertising Wheel of Knowledge

THIS CARDBOARD KELLOGG'S CEREAL ADVERTISING IS A WHEEL OF KNOWLEDGE, presenting a whole volume of interesting facts about the United States. Spin the top layer to point at a certain state and all the important facts such a state capital, population of capital, principal river, rank in population and size, square miles and year it entered the union come up instantly. On the back side is the ad for Kellogg's cereals and also tells you how to get more of these charts. SIZE is 6 1/2" square. CONDITION can be seen in the pictures. There are bends on all the corners, with one on top left being cracked. One 1" tear at the bottom near center. Dated 1931.