Amazon.com description: Product Description: This informative and activity-filled reference introduces younger children to human biology in a lively and accessible way. The book's thematic structure makes it easy for young readers to understand the various systems and organs that make up the body. Dozens of activities and experiments, including - Keeping a food diary (to analyze diet) - provide children with the opportunity to reinforce newly learned information. Full-color spreads address the questions that fascinate children, such as: What are we made of?, Why do we need to sleep?, and How do we breathe? A reference section at the back of the book includes a glossary, an index, and an 'Amazing facts' section. Special Features: Over 1,000 appealing, colorful photographs and illustrations. Clear and easy-to-understand definitions. Related activities and projects. Vocabulary carefully chosen for the 5-8 yr. reading level. Cross-references encourage further exploration.