books.google.com - Everyday examples, such as a motorcycle and a tricycle, demonstrate differences in speed....http://books.google.com/books/about/Fast_slow.html?id=gSlaAAAAYAAJ&utm_source=gb-gplus-shareFast slow
Sharon Gordon is a writer living in Midland Park, New Jersey. She is the author of several books for children in the primary through middle-school grades. Her books for Children's Press include You Are What You Eat, Chickenpox, Hearing, Smelling, and Cuts and Scrapes. Sharon and her husband have three school-aged children.