honestly, the last thing i want my kid to think in that situation is that it is okay for them to put their hands in the toaster. Which they might do if they see me do it while cleaning
which is why you unplug it before working on it and make a BIG point to the kid of both hazards, and how essential it is to remove power before working on something, AND to do test runs in a safer area like outside, etc.
>>the last thing i want my kid to think in that situation is that it is okay for them to put their hands in the toaster
I'd say that you don't want them putting their hands in WHILE IT IS POWERED or HOT. Important distinction, and best started early and often. They'll see it sometime, better to have them have a context so they can tell the difference between doing the same thing when it is smart (powered down and repairing), vs Darwin Award candidate level stupid (when powered); then they can evaluate other's actions and draw the right conclusions.
Odds are the toaster company doesnt want you mess with it either. This isnt the old days where you can just use some elbow grease and fix everything on your property. Liabilities need to be managed. Electrical items need certifications. Doing it yourself takes hours. It's just a lot of things that are unnecessary to deal with over a toaster.
If I am going to teach my kid anything about fixing electrical items it's that if it isnt working then he (or she) should unplug them and then he shouldnt touch them until certified to do so. It'll encourage them to look at the bigger picture of the problem.
Sure, as an adult we can see through red tape and feel cool about it and want to teach the same to our kid.. but it's really not worth it. Kids that are smart enough to learn the will likely experiment with new things they learn. Just because they safely unplug the item before working on it doesnt mean it's safe to plug back in afterwards.