I try to keep this in mind with my kids. I try to not worry too much about them breaking stuff, and where possible put them in situations where they can experiment and try stuff without risk of screwing something up. Although I also like to repair stuff, and I think there's something nice about them breaking it and then us fixing it.

It's why things like the RPi and the Micro-bit are so cool for education, you can experiment with them and if it all goes wrong just reset them and carry on.

However I'm also concious that I and my kids are lucky to be able to absorb any financial/time cost from them breaking something. Not everyone can.