Wet Felting:

Continually rubbing wool fibers together with mild soap and warm water to form a firm felted object.

 

Tools for wet felting wool balls and other objects…

Any mild dish soap will do, I like Mrs. Meyers soap.

Hot water

 

A medium-large bowl, a towel (to catch the drips and dry your hands in between colors) and wool

With these simple tools and a good supply of wool you are ready to start wet felting! Here is a simple YouTube tutorial on Felted wool balls.