【Content Introduction】 The "Why? How?" series is packed with content that sparks children's curiosity. Divided into books for 1st and 2nd graders, this series provides answers to various questions and conveys the joy of learning. 【Target Age】 This book is aimed at elementary school 1st and 2nd graders and is a good educational material for fostering children's ability to think for themselves. 【Features】 The books are richly illustrated, making them visually easy to understand and designed to capture children's interest. ⚫︎ Fun! The Wonders of Science: Why? How? 1st Grade ⚫︎ Fun! The Wonders of Science: Why? How? 2nd Grade ⚫︎ The Wonders of the Heart: Why? How? A total of 3 books are being sold together. The 1st and 2nd grade science books show some folding and yellowing on the covers. Thank you for looking. Thank you for your consideration.