Great work with your daughter. She is on the right path.
As someone who has worked a coal forge, I strongly suggest a gas one unless you like black mucus. Sourcing coal (and storing it) can also be difficult sometimes depending on your location. If I ever get enough time to get back into blacksmithing I will be using a gas forge, even though the smell of the coal forge is very nostalgic for me.
On karambits and all the injuries that result, the folding ones must be carried differently than a pocket knife. A pocket knife is typically kept blade rear, preferably tip-down to prevent accidental opening, at the back of the pocket. A Karambit is best kept at the front of the pocket since it must be kept tip up. Because of the chance of it moving, that pocket needs to be treated as if it were carrying a pistol with nothing else in it.
In the end, while interesting, karambits proved less useful than a knife for 99% of what you would do with either. We used them fairly heavily in the Filipino martial arts, and after using them in full contact sparring sessions concluded that for defensive use, the karambit was no better than, and in many ways worse, than a normal knife. I haven’t touched mine in years.