Me and my brother have been doing this for years. They are really easy to do. You can fit them nicely into small areas or keep them somewhere.
Step 1: Pencil
Find a pencil like the orange one in the first picture. Not any other pencil works all that well.
Take the pencil apart.
Step 3: Cutting
Cut the outside of the pencil to the size you want, not too short or it won't work. Cut the draw thing to size too.
Put the pencil back together. Add lead and use it.
I saw these in Walmart and thought of making them myself because I didn't want to pay for them. They are about three bucks or more. Usually Bic, but other companies do it, too
Plz vote for the I could make that contest.