This is a set of Shichida Child Academy Monthly CDs. Designed for preschool children up to elementary school entry, these CDs are not available for purchase unless you attend the Shichida classroom. This set includes 30 CDs: 2007 Edition: September to March of the following year (7 CDs) 2008 Edition: April to March of the following year (12 CDs) 2009 Edition: April to February of the following year (11 CDs) All CDs have been tested and confirmed to play. During this period, Makoto Shichida, the founder of Shichida, was the principal, and he appears on the monthly CDs. The classroom sessions are typically once a week, and these CDs were designed to supplement that. Although the editions are old, the content is still relevant and valuable today (including some English education). The content varies by month and includes seasonal themes, so it's recommended to play them for your child each month. We used to play them in the living room and during car rides. Rather than forcing children to listen, it's better to let them listen passively and let them become interested and enjoy it. Children have amazing abilities, and it's surprising how easily they can memorize and recite things. Many families attend Shichida for kindergarten entrance exam preparation, as well as for elementary and middle school entrance exams, and listening to the CDs daily seems to be helpful for such preparation. The exterior is clean, but as these are used items, there may be minor scratches and stains. Please consider this before purchasing. *Please refrain from purchasing if you are concerned about minor imperfections. It seems important to expose children to a lot of good content before their right brain closes. My children attended Shichida from a young age, and I truly feel that it was beneficial. Recommended for those who want to develop their children's abilities, those interested in the Shichida method, and those considering entrance exams for their children. Thank you for viewing.