Children's Encyclopedia \"Why 100,000?\" Title: Children's Encyclopedia \"Why 100,000?\" is a leisure reading book for primary school students. Target Audience: This book is specially designed for primary school students, making it an ideal choice for leisure reading. Content: The encyclopedia explores various topics and provides answers to questions like \"Why 100,000?\" in a way that is engaging for young readers. Purpose: This book aims to increase knowledge and curiosity in primary school students through its informative content. Key Features Leisure Reading: Perfect for expanding the knowledge of primary school students. Target Age: Suitable for primary school students. Content Focus: Explains various topics with answers to questions like \"Why 100,000?\". Perfect for Primary School Students: Increases knowledge and curiosity. Leisure Reading: Ideal for further reading.