I bought this yarn at Magical Yarns (Magiske Garner). It is rolled up on cones. I needed some way for it to turn, when I pull the thread. So it doesn't get twisted.
You've found this little project on the internet you want to try. It is Tunisian Crochet, so... do you need to buy a special Tunisian hook for it? Maybe not.
I went to a Danish yarn exhibition today. There were yarn, yarn, patterns, tools and more yarn on display. And 50 workshops in 3½ days. 500 workshop seats all sold out!