Used, but clean. See pics 📸 "The authors of the popular Nature Crafts for Kids present a new book with 50 hands-on science projects for kids. All in full-color, the book brilliantly shows an entire year's worth of things to bring out the artist and the scientist in the 8-to-12 set. Accompanying many projects are easy-to-understand sidebars that explain the scientific principles and facts the projects are demonstrating." E