All through their lives, I've done it for them. Set-up new hardware, installed new software and acted as in-house technician whenever things went wrong. As a result, I have a family of digital illiterates.
It's fantastic that everyone from the smallest child to the eldest grandparent can now use a computer with absolute minimal technical literacy, but it's also a disaster. It didn't used to be like this. Using an OS used to be hard work. When things went wrong you had to dive in and get dirty to fix things. You learned about file systems and registry settings and drivers for your hardware. Not any more.
There are no airplanes, only computers that fly. There are no cars, only computers we sit in. There are no hearing aids, only computers we put in our ears.
Stop fixing things for your kids. You spend hours of your time potty-training them when they're in their infancy, because being able to use the toilet is pretty much an essential skill in modern society. You need to do the same with technology. Buy them a computer by all means, but if it goes wrong, get them to fix it. Buy them a smartphone, give them £10 of app store credit a year and let them learn why in-app-purchases are a bad idea. When we teach kids to ride a bike, at some point we have to take the training wheels off. Here's an idea. When they hit eleven, give them a plaintext file with ten-thousand WPA2 keys and tell them that the real one is in there somewhere. See how quickly they discover Python or Bash then.