In Creative Mode, you have unlimited resources (meaning you will never run out of blocks), the ability to fly, and some blocks you cannot find in Survival Mode: Mossy Cobblestone, Mossy stone bricks, and some Nether Quartz bricks. Also, you can break every block (except liquids) and break them instantly. Non-hostile mobs now spawnable (Sheep, Cows, Pigs and Chickens.) Plus, you have buckets now (lava, water and empty bucket.) Creative Mode is a great place to experiment with objects, mess around or build things.