I've been working hard on this 4-book Minecraft series for Lerner Books. I even took work with me when I went on vacation in November. The books are for 8–12 year olds. My personal favorite is the creative mode book. However, redstone is a lot of fun too, especially the railroad tracks. I'm hoping to take a video of the roller coaster I built and include it on my blog (once I figure out how to do that). The neatest thing about redstone is that it's easy to build rollercoasters and you can click on a mine cart and go for a ride. What a thrill!