The importance of the First Amendment and the concept of "intellectual freedom" might not always be readily apparent to most kids, but Banned Books Week is a great opportunity to make those lessons come alive for children—and adults.

Banned Books Week is held annually during the last week of Sept. (Sept. 30-Oct. 6, 2012). The week is an occasion for libraries and bookstores across the U.S. to help folks realize just how real and ongoing a problem censorship is. More than 11,000 books have been challenged (though not necessarily successfully censored) since 1982, the inaugural year of Banned Books Week. According to the American Library Association (ALA), the vast majority of challenges to books are initiated locally by parents, likely in well-meaning attempts to protect their children.

Last year, there were 326 challenges reported to the ALA's Office of Intellectual Freedom, based on everything from offensive language, to violence, insensitivity, religious viewpoint and sexual explicitness. In addition to those challenges, the ALA estimates that as many as 60 to 70 percent of challenges may go unreported. Over the past year, the 10 most challenged titles were:

1. ttyl; ttfn; l8r, g8r (series) by Lauren Myracle 2. The Color of Earth (series) by Kim Dong Hwa

3. The Hunger Games trilogy by Suzanne Collins

4. My Mom's Having A Baby! A Kid's Month-by-Month Guide to Pregnancy by Dori Hillestad Butler

5. The Absolutely True Diary of a Part-Time Indian by Sherman Alexie 6. Alice (series) by Phyllis Reynolds Naylor