Benesse Shinken Zemi Elementary School Course Challenge 1st Grade "Kokugo Sansu Start Bacchiri Band" Learn math in a fun way with Korasho's singing voice. This watch-type calculation item starts with "How many in total?" and "How many more?" and covers the basics of addition and subtraction. It also features a song mode, calculation mode, and time attack mode. Instruction manual is not included. It has not been used much and is in good condition. Batteries have been replaced with new ones. Please only purchase if you understand that this is a used item stored at home. Please refrain from price negotiations. #Challenge #Korasho #Watch #Calculation #Addition #Subtraction