Oceanic Redstone is redstone map for Minecraft PE. You will get some houses on the small islands. On this map you can use about 50 different mechanisms, from very small and easy to big and difficult. It is very good chance to see how to create new redstone machines and of course you can then use it on your maps and constructions.
You can enter houses and use all redstone there. Try to learn how it works.
As it is island and ocean, you can meet this green friends
Try to find something useful in chests
download this redstone map for Minecraft Pocket Edition 1.5/1.6 +