It's from the book Artful Christmas, which I love. It contains tutorials for 30 different holiday projects using a variety of techniques and materials.
You only need a few supplies to make the ornaments:
A felting pad
A #38 felting needle . . .
Styrofoam craft balls, whatever size you prefer
Scraps of yarn or wool felt
(the felting multi-needle tool pictured is optional . . . it just makes the project go a little faster) . . .
The directions suggested wearing leather gloves to protect your hands when in a frenzy of needling. I found them hard to work in and took them off. As always, you just have to keep your eyes on the needle!
To make the ornament: Spread a layer of wool over the styrofoam ball and needle it on until it is felted. For embellishment, needle on swirls of yarn or wool felt designs (I did polka dots). Each ornament took about a half-hour to make,