Apparently there is a chemical way to cause water to turn into solid balls at room temperature. For instruction see the video below:
How to Turn "water" into Balls - For more funny videos, click here
I am not sure if this one is not fake, however. The thing that makes me suspicious is that water turns into balls when it is out of the tank. In my opinion, there are simply glass balls of the same color inside of the water. While in the water they are invisible.