There is a kit that you can buy that includes four 100-yard skeins of hand-dyed wool-silk blend yarn and a silk scarf dyed with the same colors. The idea is to knit a scarf out of the yarn in such a way that you can thread the silk scarf through the knitted scarf (and there are several ways it can be threaded).
I made a purple one for my mother for Mother's Day:
And I bought a brown and teal dyed kit to make one for me. I started that one, but my knitting got tighter as I knit, for some reason, and the scarf began to get too narrow. I decided to "frog" it (rip-it, rip-it, rip-it) and will try using the yarn for something else.
I did make another scarf in a scarf, however, when I found a scarf in colors that my daughter loves (yellows), and then got some yarn to go with it.
I also made what is called a mohair bias loop (which is joined in such a way that you can't find the beginning or ending) and it was fun to learn how to make.