By studying Japanese and math, you earn stars, and when you collect stars, your medal levels up. A set of limited edition clear shiny covers is included. This educational material allows you to practice "numbers up to 10," "hiragana," and "words," which are studied in first-grade math and Japanese. You can use it while having fun in a game-like manner. You can enjoyably acquire the basics of first-grade learning. Thank you for viewing. Kodomo Challenge