Used postage stamps from the Picture Book World series, 56 stamps with paper included. Series 1: "The Runaway Goldfish" - 1 stamp Series 2: "The Very Hungry Caterpillar" - 2 stamps Series 3: "Guri and Gura" - 8 stamps Series 4: "Swimmy," "Frederick," "Alexander and the Wind-Up Mouse" - 10 stamps Series 5: "Shirokuma-chan's Hotcake" - 10 stamps Series 6: "The Bears' School" - 10 stamps Series 7: "The Best Cat in the World" - 10 stamps Series 8: "No" by junaida - 5 stamps