This is a 12-book set from the "Hakken!" series, designed to provide fun learning experiences for children. There are no separate supplementary booklets, but everything included with the main books is present. - Set Contents: Hakken! Set from April to March - Publisher: Gakken Thank you for looking. Unfortunately, these books were brought home from the nursery school and have been stored without being used at all. If anyone would like to make use of them, please consider this offer. Unmarked, for elementary school entrance preparation.