At what age did your kids start joining you in the shop while you worked?

I’m a hobbyist and I do most of my work on weekends and lunch breaks in my 2-car garage shop. My oldest son turns 2 next week and he’s showing lots of interest in my tools and projects whenever I bring him out in the shop while cleaning and organizing.

He’s just getting through that stage where they find all these remarkable and clever ways to hurt themselves on what you *thought* were harmless objects, so I’m under no illusions that I’ll be building anything with him in the near future that doesn’t involve friction fit joinery with plastic blocks… but I’m just dying to get him out there with me.

So exactly how long am I looking at?