On the Circular Disc for Year Calendar the Annual Ring 03000 can be placed centrally. For each day a marble will be placed on the ring, starting at the current month. At the end of the month you clear the ring and space is made for the new month. One wooden disc with 35 coloured wooden marbles. Materials: lime and maple wood, non-toxic water based color stain, non-toxic plant based oil finish. Size: diameter 50cm.