well....over 25 years ago I would guess...
Needle felting is done by poking a barbed needle down into carded wool roving, to form a shape.
you can either felt it onto a flat piece of wool fabric, or felt it into a 3-dimensional shape.
(except for the stickers, hay & 'stuff' that gets caught in the wool...
I'm one of the best wool-pickers I know!)
I prefer using Natural materials as dyestuff, and Vinegar as a mordant.
Barberry ~ yellow to deep green
Blackberry ~ purple to grey
Currants ~ lilac to dark purple
Daylily ~ golds, to blueish grey
Elderberry ~ purple/blue
Grapes ~ brilliant reds to purple
as most of these plants will stain your skin in their wild-state...