Summer is almost here, and the children in your life are probably looking for fun books and activities. The U.S. Environmental Protection Agency is currently offering free activity books for children! These free activity books from the EPA cover a variety of topics including the effects of Asthma, sun exposure safety, pest management, and so forth. Any activity book with a United States Postal Service logo next to it can be mailed directly to you for free. All other free activity books can be downloaded in PDF format.