I won't let people use my splitter... if they are a friend... I do it.
Splitter travels with me... last thing I want to hear is the kids wanted to help and had an accident.
I do encourage them to do a lot of things... age appropriate.
All I need to do is tell them about the accident their great grandfather had and that's enough to dissuade them.
We have been heating with woodsince we bought our house in 8/1994, and used a combo platter of rented, borrowed, and finally our own splitter, as well as a whole bunch of hand splitting [which I have been doing off and on since my teens], and aside from minor dings and scratches, neither ofcus got hurt except once I got my left ring finger caught between a twisted piece of wood and the splitter table, causing a tiny, but stable crush fracture of my bone, the only effect of which was that I could no longer wear my wedding ring.
So I got one tattooed on instead.
The last October, I dropped an 16" diameter x 18" long ash log on my left big toe.
Now it's well healed, but 8 weeks limping around in a cast shoe put my back out, and I have been going to the chiropractor once a week since then trying to get it back to rights.
All it takes is a moment of inattention or relaxation of the safety rules, and potentially a lifetime of regrets can follow.
God bless and watch over us all, and the OP will be in our prayers for a complete recovery.
Thokas