Hi, my name is Olivia. I'm 6 years old, and sometimes I have questions about the world around us like: How do clouds make rain? Why is the sky blue? Why do the leaves turn different colors in the fall? Why do balls bounce? When that happens, I always go to see my friend, Dr. Heidi. Dr. Heidi is a real scientist and probably the smartest person in the whole world. She always knows the answers to my questions. She also knows how to do all kinds of fun, easy experiments that help me to really understand how things work. Today Dr. Heidi and I are having fun exploring chemicals. Everything we see, smell, taste, touch, wear, eat, breathe, and hear is made of chemicals!Why not join us and have fun finding the answers to all your questions by doing things like making a bouncing ball, watching crystals grow, and making really sticky glue. "The Little Scientists Hands-On Activities" series of books is an outgrowth of the nationally acclaimed Little Scientists educational program. Like the popular scientific enrichment classes for which they are named, these books are designed to expose kids, ages 5 to 8, to the thrill of scientific discovery, while helping them to develop core scientific skills of observing, critical thinking, communication, classifying, comparing, applying and generalizing, measuring, predicting, hypothesizing, and problem solving.