Infinite resources on Minecraft PE v1.2.6 + Realms

• Tap on crafting table
• Choose something to make that you don't have the materials for, eg Beacon is often a good bet. (You might have to switch the `Items` switch at the top)
• Now you will see the recipe displayed, and all the materials will have a red background, as will the final item created – eg indicating you cannot make this.
• Now within the recipe section, tap on anything that is red, and then tap somewhere else within the recipe to rearrange it.

The act of rearranging will actually cause the item that you didn't have to be added to your inventory. Repeat as many times as required and you can create anything without ever needing to have the resources beforehand.