The Stamp Game encourages children to work individually with the decimal system and helps to take a step toward abstraction. Quantity and symbols of the decimal system have been combined, represented by each “stamp.” Set consists of a six compartment wooden box with lid; green, blue, and red “stamps” printed with 1, 10, 100, and 1000; color-coded wooden division skittles; and color-coded wooden discs. Game provides practice in the operations of addition, subtraction, multiplication and division.