Why can't I change my skin?
Solution 1:
- Insure you have Minecraft PE 0.11.x+
- Search "Skins for Minecraft" in the kindle App Store, and then click an app.
- Install the app, and open it up.
- Click the head of the skin that you like the best.
- Click the "Download Skin" button.
- Open up minecraft, and you will see that your skin has changed!
Source: Wikihow