First of all thanks to Py Guy for a great lines challenge, it was fun!
I thought long and hard about what subject to use and came up with water because it has such a wide application and lots of readily available subjects.
To start things off, a source
of water is needed, for example a water hose its a beer bottle rain. Water has interesting uses amsterdam harbor to cool recreation
It is a biological necessity.
Macros with water are fun wet butterlfy rose another flower and a few more suggestions to get you started james river water fall . Remember this is not about who has the best camera, lens or whatever, have fun, be creative, lets see what you can do!

RobinG has gracefully agreed to "sponser" the next challenge, I'm sure it'll be a great one...now get out there and shoot!