My daughter Jane (age 11) grew bored with World of Warcraft (at least for now), but her passion for Minecraft has not waned after a couple of years of playing it. She and her friends love to create towns with libraries, city halls, apartments, subway systems, farms, and jails. I enjoy playing Minecraft with her, too.
If you are interested in getting started in Minecraft, buy it and start chopping and digging. Get answers to your questions by asking your kids, and referring to YouTube and Minecraft wikis. If that's still not enough, here are a few recommended Minecraft books:
The Ultimate Player's Guide to Minecraft, by Stephen O'Brien. This thorough guide to surviving and thriving in the world of Minecraft was written by a guy who loves Minecraft and has explored it deeply. (The author is also the inventor of the Mypressi espresso machine, which we reviewed on Boing Boing Gadgets. I miss Boing Boing Gadgets.)
The Minecraft Guide for Parents, by Cori Dusmann. This is especially good for parents of younger kids who need help buying and installing Minecraft. It also has good tips on how to play Minecraft with your kids.
Minecraft: The Unlikely Tale of Markus "Notch" Persson and the Game that Changed Everything, by by Daniel Goldberg and Linus Larsson. A compelling short biography of the creator of Minecraft. It's intended audience is probably adults, but most 10-year-olds would have no problem reading it.