Textures in Watercolor

This week I organized two watercolor workshops on college, where I tried to pass a bit of what I've learned in watercolors so far to the people who were participating there. So I organized this small piece of paper with some examples of possibilities of textures in watercolor. 

Although it's in Portuguese, in order from up to down and from left to right, it reads:
salt - plastic film - alcohol - nail polisher (two variations, one with and one without acetone)
oil pastel - masking fluid - tape - mashed paper - sponge
blowing air with a straw - bubbles - water over paint

I hope this can be useful to someone! If you have any doubts about how to achieve these effects (like what paint and water concentration to use, how much to wait until the effect shows) just ask me in the comments.

Featured in this very useful journal by khallandra (thank you!):
PE: Comparing Copics and WatercoloursTraditional Art
Introduction
When starting out in traditional media it can be a little intimidating to decide upon what medium to start or try working with. After seeing what some amazing artists can do with these traditional tools, it may be difficult to choose which one to try out. This article endeavours to cover two such mediums, Copics (an alcohol based marker) and watercolours (a water based paint), starting to compare them for the newcomer.

Costs and Initial Set up
The initial cost of any traditional medium can be expensive as several things need to be purchased at the same time. There are often cheaper alternatives to the paints and markers that can be substituted.
Watercolour Tools
Watercolours come in a few varieties, the two most common being pans or tubes. A set of Winsor & Newton pans (12) is around $22USD whilst a set of 10 tubes is about $35USD. They can be purchased individually