Hi IcyDove,
I guess we gals need to stick together here as the guys seem to be totally lost

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I am not sure that pen blanks are going to be long enough, aren't hair sticks usually 7" to 9" long where I think many pen blanks are closer to 6". They may be a little to short for what you want.
I would suggest that you get a good bench knife. You can purchase one starting around $20. The bench knife is the most basic tool to carving. Since your finished sticks are only going to be about 1/4" at the thickest width I would think that you could detail carve each easily just with the bench knife.
If it were me and this is just a suggestion, I would practice on either some white pine or oak. Take a nice piece of firewood, small wedge, and a mallet. You can set the firewood on end and knock off nice thin straight grained pieces then whittle those pieces to the size that you want. After you have tried a few sticks then you can move to other woods and split them on the scroll saw. With split pieces you could add a decoration to the end as well as to the staft of the stick.
For you guys out there ... a gal with long hair can pull their hair into a pony tail, then twist the ponytail for some tension. You then tie that twisted pony tail into a single knot and use the hair sticks to hold the knot in place on top of your hair .... that's one of the ways your Grandmother wore her hair in a bun without using bobby pins. Think about the secretary at work that pulls her hair up using pencils ... think about the oriental Geishas ... Duh! Now there are some very easy practice sticks - pencils!
Hair sticks are very popular today and great if you do any arts and craft shows!
Susan