Home economics and life sciences Brain training method Kubota method for children up to 5 years old who can develop thinking ability and arithmetic ability only by mental calculation.
※Please note that product information is not in full comprehensive meaning because of the machine translation.
Japanese title: 単行本(実用) 家政学・生活科学 暗算するだけで考える力と算数力がつく5才までの育脳法 クボタメソッド