Using a crochet hook as a nostepinne is very similar to using the pencils. Start with the largest crochet hook you've got available.
For me, that's a 9.00mm hook. Larger would be better.
First, make a slip knot at the hook, as if you were about to do some crochet. Snug the slip knot tight at the throat of the hook, so it won't slide up as you work.
Pull the yarn up to the other end and start wrapping back towards the middle, just as was done for the pencil method.
The ball of yarn I'm using here is a fair bit bigger, so I made the core a bit longer than for the previous balls. Again, wrap back and forth for a few layers, then continue the same as with the pencils.
As I wrapped, I made the height of the ball greater than the core by changing the angle of my wrap, allowing the yarn to go over the top and bottom every now and then. In this photo, only about half of the ball has been wrapped. Then I gave it to my younger daughter to finish so I could upload the photos and start these posts.
She loves making these!
There you have it. Three methods of making a centre pull ball of yarn.