The entry about pin stones isn’t actually an instruction but a (wonderful!) inspiration.
I like them so much!
I suppose that she made the pin stones in the same way than felted beads, for which I found an instruction, too.
You can find gazillions of tutorials on how to felt beads (see links below).
Links:
Pin Stones (Nadelsteine) (German)
At knitty: Felted Beads
Google search result for ‘felting beads’
Google image search result for ‘felting beads’
Google search result for ‘perlen filzen’
Google image search result for ‘perlen filzen’