Here's how you can download the Minecraft - Pocket Ed. Demo app free for Android devices.
1. Go to the Google Play page for the free app Minecraft - Pocket Ed. Demo.
2. Tap the Install button.
Here's a description of Minecraft - Pocket Ed. Demo:
"Minecraft - Pocket Edition allows you to build on the go. Use blocks to create masterpieces as you travel, hangout with friends, sit at the park, the possibilities are endless. Move beyond the limits of your computer and play Minecraft everywhere you go.
Limitations of the demo version
* The world is not saved between sessions
* Multiplayer worlds can not be copied to your phone
* Only 18 of the 36 different blocks are available"