The better things you will get in this island is lots of mooshrooms. The special animal live in the mushroom island it look like the cow, and of course you can sheared for mushrooms which can be used to cook edible stew.
Minecraft PE Seed: pot22 – Mushroom Islands
In this seed you spawn on a normal small island. Close to you, on your left is another island with same size. But the two island isn’t the main section of this seed, just overlook them. From the spawn just walk straight ahead and swim to the water and keep that direction soon you will see the coast of the mushroom island. The mushroom island quite large, the size of it about double size of your spawn island.
Seeds : pot22 Work in PE ver0.9.0+ or ver0.9.5