The first line for the entry "play" at Wikipedia describes the activity of play as "a range of voluntary, intrinsically motivated activities that are normally associated with pleasure and enjoyment." But for me, this play isn't easy. It's all about practice with this watercolor media that in my mind, continues to mystify and elude my understanding. As soon as I hit upon a method that works okay for me I am wanting to try another way to approach watercolor painting. I think it's because of my perceived difficulty with this media that I keep at it, as a form of play. It's all about the process rather than the product. If it were easy for me to accomplish what I want with watercolor, I probably would have moved on to something else by now. And as for my investment of time and materials, well, all of my watercolor supplies have, as any parent knows, tremendous "play value".
Compared to other challenges,
the ultimate shortcoming of technical problems is not that they're hard,
but that they're easy.