27 different shelters in 6 states. take as many books as you want. if one child finds the love of reading through books that i've given them, then that will turn their life around entirely. i really think that reading can do that for someone. >> larry: mackenzie's given nearly 40,000 books to kids in 6 states. mackenzie, we applaud you. you're a terrific kid. got a hero of your own? nominate them at cnn.com/heroes. back with more of dr. laura after this.