He's poking the water with a stick... no idea why...
...but it should work for other phones as well.
Trying a few things out at work. This is a speed painting I made while testing the painting materials at our disposal. I kinda like the deep blue tone of this cheap color; looks nice to my mind. Took me about an hour or so I think, but then again, it's a rather rushed little thing.
Water color, water coloring pencils, white ink, A4.