New medium

I went to the art supply store (FLAX) in San Francisco the other day and bought myself this watercolor sketchbook with beautiful handmade paper. I also bought some watercolor pencils. I like the idea of them for having painting materials while traveling. The concept seems simple enough---draw with them, then add water and presto! What looked like drawing with colored pencil now turns into watercolor! I'm finding, however, that they need to be used in layers, just like watercolors. Of course they don't work in quite the same way as regular watercolors, so I'm struggling with them at the moment. Much more practice ahead of me!