I'm trying to learn to spin with a drop spindle, but so far the results aren't exactly spectacular. I finally, after many tries, made a yard of something that resembles yarn. (I'm afraid that's the best I can say about it...)
It took a very, very long time, though, and it wasn't exactly done correctly. Plus, it has now mostly untwisted.
Oh well. I'll use that fiber for needle felting. You can use pretty much anything for the core... In the meantime, I've emailed the Peachtree Handspinners Guild to see if they can refer me to classes or recommend a good video.