If you work with your hands, your kids mostly see you being good at things. That is what a trade looks like from the outside: somebody who walks up to a problem and handles it.
That is a nice thing for them to see and a strange lesson to take from it. Because what a kid concludes, watching only competence, is that adults simply know how to do things. Which means when they try something and it goes badly, the obvious explanation is that they are not one of the people who can.
The missing footage
They did not see the years. They did not see the first crooked cut, the job that got redone, the two weeks of being the slowest person on the crew. All of that happened before they existed or out of their view.
So the correction is not a speech about how you were bad once. Kids discount speeches. The correction is letting them watch you be bad at something now, in real time.
Pick something you are actually bad at
This only works if the struggle is real. Kids detect performance instantly.
That means something genuinely outside what you do. If you frame houses, do not pick a woodworking project. Pick an instrument, a repair in a trade that is not yours, a language, a computer skill you have avoided for a decade. Something where you will be visibly clumsy.
The unfamiliarity is not a side effect. It is the content.
Narrate the middle
The valuable part is not the failure and not the eventual success. It is the part in between where you do not know what to do yet.
Say it out loud. I do not understand this yet. That did not work, so I am going to try it the other way. I am going to go find out how this is supposed to work before I break something. This is frustrating and I am going to keep going for another ten minutes.
That narration is the whole lesson. It shows that not knowing is a stage rather than a verdict, and that frustration is something you can name and continue through rather than something that means stop.
Being corrected in front of them
The related move, and a harder one: let them see you take correction.
Ask somebody who knows more. Follow the instructions after ignoring them. Say you were wrong about something and change course. Kids who never see an adult accept correction learn that being wrong is a status problem, and that lesson makes them defensive for a long time.
What this does over years
Children build a working theory of how ability happens. The two available theories are roughly: some people can and some cannot, or people get better at things by doing them badly for a while.
The second theory produces a kid who tries out for the team, takes the harder class, and picks up a tool. The first produces a kid who avoids anything that might expose a limit, which looks like laziness and is closer to fear.
You cannot install the second theory by explaining it. They get it from evidence, and the most available evidence is you.
Also, it is good for you
Being a beginner is uncomfortable in a way that competent adults arrange their lives to avoid. Doing it deliberately once in a while keeps you honest, keeps you sympathetic toward the new person on the crew, and reminds you what learning actually feels like from the inside.
Most people in the trades have not been genuinely bad at something in front of an audience in a long time. Doing it in your own garage, with a kid watching, is a low-stakes place to remember.
And they will remember it. Not the finished result, which will probably be mediocre. They will remember that you were terrible at something and did it anyway, which is the exact thing you want them to do when their turn comes.