You'll need a barbie, if you have little girls you likely have a ton around the house...if not you can pick one up from Wal-mart for about $7 You'll also need pipecleaners and boiling water....that's it!
Begin by cutting your pipe cleaners in half; into about 2-3 inch strips. Then bend those strips in half to form little "v" shapes. Section small pieces from Barbie's hair starting from the back and place your v shape at the base of the strand. Then begin to wrap the hair around the pipe cleaner in a zig zag motion. You can simply twist and fold the ends to keep it in place. For all of my hair stylists/junkies you will find this similar to a flexirod set :)
After the whole head is complete, dunk into a bowl of boiling water for about 10-15 seconds and allow to dry completely, preferably overnight.
Once completely dry, untwist the pipe cleaners and unravel the hair. You should be left with what looks something like a twist out.
Continue to fluff or "pick" Barbie's hair and use scissors to trim the fro into shape.
I surprised my 4 year old great-neice, Jaela with two new barbies. Of course she loved them both equally but when I asked her what she especially loved about each one she said she loved the dress on "straight hair" barbie and loved the hair on her new "afro barbie"