The one in her hand was made with 9.
You will need yarn and two people, which is part of the charm. It takes two people working together to create something fun. (Oh so many lessons and parallels we could make while creating these.)
4 strands of yarn will create a thin-ish bracelet. 9 strands creates a fun choker. The 9 strand example started with a yard each.
(A note on colors: If you keep your colors together at the beginning, you will create the candy-stripe look.)
If it isn't evenly twisted, the partner not holding it can smooth out those bumps along the way.
And you will get:
Go out there and teach team work and create some fun friendship bracelets.
I think these would be fun to try with embroidery floss as well. I wonder how they will turn out . . .
**If you look carefully you will see the smaller versions on each of the girls.