"Stringy-things in my hair"

Kaitlyn has been bugging me the last couple of days to put a "stringy thing in her hair."  I really didn't know what she was talking about.  She said her friend Grace had one that was purple and yellow, and most recently our neighbor Brianna came home from Disney World with one in her hair. 
Oh, now I remember!

                        I used to know how to do this.  I needed a little refresher course from ehow.  I remember feeling so cool when I was a kid with one of these in my hair!