What you need to make the balls:
· Core; second grade fleece
· Woollen thread
· Fleeces in desired colours (suitable for felting, for example merino)
· Felting needle, or felting needle holder with several needles (makes it quicker)
Method
Form a ball with the second grade fleece and wrap the woollen thread tightly around it, adding fleece where required to make the ball nice and round.
When you have reached the desired size, prick it with the needle(s) until you are happy with the shape.
Wrap one layer of coloured fleece around the ball, and prick it on tightly. Then let your imagination run wild by adding different colours to create a truly original felted ball.