Amazon.com has launched Kindle FreeTime Unlimited, a subscription service that offers access to thousands of handpicked books, movies, television shows, games and educational apps appropriate for children ages 3 to 8. The online retail giant promises, "Parents don't have to spend time (and money) guessing what their kids will enjoy, and kids can explore a world of age-appropriate content on their own -- no ads, no in-app purchases."

The service, included as a free trial on every new Kindle Fire, debuts with a library that includes the Disney-released Marvel picture books, Warner Bros. Consumer Products-produced DC Comics apps, Lincoln Peirce's Big Nate, Bill Amend's FoxTrot, Mark Tatulli's Lio, and Graphic Universe's "Graphic Myths & Legends, Sherlock Holmes and "Manga Math Mysteries" series. Presumably we'll see more kids' comics as the rollout continues.

The monthly subscription is $4.99 a month for one child, and $9.99 for up to six (cheaper for Amazon Prime members).