You have to update Minecraft latest version to use this mode. Follow the simple steps below

Create a creative mode world. Superflat is most recommended.

Then, open your inventory. You will see almost every block/item in here. Bottle O Enchating just gives experience points.

Select some blocks, and build away!

Note

• The light switch is most recommended to make a cool house.
• Want less entity? Play in Peaceful.
• Most recommended for 1.8-1.0 and 1.2.3.

• Be careful! You can delete bedrock, and you could end up in the Void!