If you want bone to make them from, have a look in the pet shops. They sell chunks of boiled and cleaned bone ready to use
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Best to do any sanding outside, and I'd wear a mask too. The smell and the bone dust gets everywhere
![Yuck :yuck: :yuck:](/community/styles/default/xenforo/smilies/yuck.png)
.......yeah, I know I'm a good vegetarian, but the principle holds, you don't want to be breathing the dust in if you can help it.
Interested to see how you get on with them
cheers,
Toddy