Two boys, I raised alone, from 3-5 yrs old. They never touched my gear, they always knew from the get go, this was mine, and the rule was 'Hands off" no matter what. Boys will be boys, and get into things they ought not.
In fact, now both adults - both still to this day, will not touch my gear! They can take my truck, have all the food they need and same with cash-(if I have it) But they know the drill, We had the following:
"The magic belt of power" "The hairbrush of doom" and the "Good boy wooden spoon" My aunt would grab one of these items when I was a kid if you crossed the line, and you know what? I never had to use them not once!
"that's my dad's stuff, we don't touch it"