White Wolf has released World of Darkness: Innocents. Innocents casts the players as 7 to 12 year olds in the World of Darkness. According to the product description, the book includes a version of the Storyteller system geared towards playing children.
There are two ways to order this book, as a hard cover directly from White Wolf (or from your favorite game shop), or as a soft cover, black and white, print on demand book from Lulu. The price difference is only about $5, so there’s no real savings.