Flug zum Nordpol (Flight to the North Pole) is knit with a Blue Face Leicester sock yarn which was hand-dyed by my daughter, aka known on the Internet as Valley6222. (I am soooo lucky!) It's a gorgeous bright ice-blue which, in my opinion, fit the theme. The first sock in size 7-1/2 to 8, used 31 grams. So I have plenty left to knit the second sock, plus left-over yarn for toddler or baby socks.
The "Christine" pattern is being knit with a hand-dyed non-brand name sock yarn, from a no longer remembered source. That's what happens when you have too much yarn sitting around the house.