1, latex and water in a 2:3 ratio and mix thoroughly.
Put the wool arbitrary Jimmy tuned latex water and rubbed with a finger.
3, blowing balloons, yarn wrapped in a balloon. Irregular wound. Do not need to be too dense.
4, twelve hours on the sun exposure.
When dry after carefully punctured the balloon. Remove the complete line of balls. Ha ha. You can try different materials line, there will be different effects.