This has nothing to do with art, but I find it so inventive, that I have to post it. It is a very easy, cheap, but handy shower, not the camping type. You have hot showers for free, without missing the comfort of your normal shower. Well almost.
First get 2 garden hoses, and put one end on to a tap inside the house. I put mine on the one beside the washing machine. You can take an outside one of course as well, so long it is not too far away from your solar box.
Make a gap between window and wall or any other to go outside.
Entering the box on a flat roof. Do not lay them straight onto the tarmac, cause the hose melts into the tarmac than.
Lay the garden hose in nice loops, otherwise you get cold gaps.
Put your second hand windows over the box.
Back into the house and connect to the warm water pipe of your shower. close house warm water and open solar water. Now you can shower like normal .The hot will be so hot after 1 hour sun, that you have to open your cold tap as well to get the right mix.
You can do this with one hose as well, what gives you more pressure but only a quick shower, meaning water off, when soaping in. In the beginning it stinks very much after garden hose, but that goes after a while. Happy free showering