Mine were taught long before age 2 that when I said “hot” then they’d better stay away from whatever. Their little minds never forgot. I’ll give you that some kids can be stubborn but that’s no excuse. Parents need to be the parents and keep them and the dogs inside when dad is mowing or using other potentially dangerous tools.
How did you teach them what "hot" meant?
I told my son, who was out with me after I changed the belt on the riding mower which then started to smoke due to routing it over a guide instead of under, not to touch it it was "hot"! As I was walking toward the garage to get my tools (the mower was off) he reached under to touch the belt and got a small burn on his finger. After that, he knew what "hot" meant. Before that I'm not sure.