Hydrokinesis is the ability to influence the motion of liquids, it is also said that it is the ability to manipulate the water (Although, I do not know how true this may be)
Technique
The reason for the cork is so you can see if there is any movement in the water
The more you do this the longer you will be able to concentrate, which in turn will make the technique easier to perform
Find a bowl to work with and fill it with water
Place a cork or something that can float in the center of the bowl and wait until it stops moving
Once its settled, close your eyes and sense the water in front of you
Feel the waters energy merging with the energy of your body
With your third eye visualise the link between you and the water
Feel its smoothness and healing properties
Now open your eyes and look down at the water, DO NOT lose the connection you have
Begin to will the water to move, making it swirl in the bowl, gaining speed and strength
Continue to do it until you feel you have succeded or you need a rest