Practice Watercolor

I am learning a new technique of negative painting, in my watercolor class.  It wasn't as easy at it looked on the demo.  Practice is key, and these are my practice pieces.  With each one, I learned what not to do and some of what do.  Composition is not the greatest, but I think planning a bit better would have given me a better perspective of a composition.  I learned, each layer should be very dry is the key to success - I used a hair dryer and I think some of the times it was still a little damp and I didn't get the expected result.  My last piece is not shown yet as it is a postcard the class is doing on an exchange, and I can post it later.  Was a great fun technique to do.