If you are looking for a way to quick and easy get items and blocks or change specific gameplay options in Minecraft PE then you can use the this mod to control the game extensively.
The Advanced Too Many Items mod is an upgraded and more fancy version of the older one. Both function in similar ways but this one offer better functionality, more options and a more beautiful user interface.
How to use?
In the top-left area of the screen there will be a M button which when tapped on opens a graphical user interface. Here you can select any kind of item or block you want.