A new version is available, corrected, improved and with directions for the sweater.

You can use any yarn, gauge is not crucial, but you should knit tight enough to avoid the filling to show through the stitches.

25 agosto 2010: da oggi è disponibile la versione in italiano dello schema (il pdf è scaricabile come free ravelry download)

December 15th 2010 - eileeng found a mistake in the first lines of the directions
ERRATA:
Head
co 6 sts divide them evenly on 3 needles
Round 1: k
Round 2: k1 m1 k1 (on each needle) you have 9 sts
Round 3: k
Round 4: k1fb k2 on each needle (you have 12 sts now)
Round 5: k
Round 6: needle 1 - k1fb k1 k1fb k1; needle 2 - k1 k1fb k1 k1fb ; needle 3 - k2 m1 k2 (you have 17 sts)
Round 7 : k
Round 8: needle 1 - k2 k2fb k2; needle 2 - k2 k2fb k2; needle 3 - k2 k1fb k2 (you have 22 sts)

09/28: released updated versions (in English and Italian)
28/09: ho pubblicato una versione aggiornata (in inglese e in italiano).