If you're new to Minecraft PE, this ultimate crafting guide may be very helpful for you. It contains all kinds of information about in-game blocks and items each accompanied by description and recipe. You can read info about mobs and how to find them, learn more about different biomes and their features. Definetely a must have app, for kids who start playing MCPE on Android.
How to install:
Download and run .apk file below
Be sure that BlockLauncher and Minecraft are of the same version
Enable app installs from Unknown sources in Settings, if needed