Bornelund LearningWrapUPS Educational toy for addition. ① Hook the string on the groove of the first number. ② Add the number in the middle (+○). ③ Hook the string on the groove of the answer. ④ Flip it over and check the answer using the raised patterns on the back. There are scratches on the numbers (see photo 4). There are some scuffs from use, but I think it's still usable. Please understand that this is a used item that has been stored at home before purchasing. Shipping will be anonymous. It will be shipped via either Rakuraku Mercari Bin or Yu Yu Mercari Bin.