Set of 5 issues of Kodomo Challenge Step for 4.5-year-olds: Thinking Skills Boost, June, July, October, December, and February. New and unused, but the "All Done Stickers" are missing. Also, the February issue does not include the "Box Game" supplement. Please understand that these items have been stored at home and may have some minor scratches or wrinkles before purchasing. - Title: Thinking Skills Boost 6, 7, 10, 12, 2 - Number of books: 5 - Contents: Educational materials to develop thinking skills - Target age: Preschoolers Thank you for looking.