My children asked for own Windows accounts

Today is end of the universe

I cannot believe, but I have following following conversation with my son (age almost 6):

• I will never hack in to Your account Daddy. - said D.
• Why You want to do this? - me
• Because I don't have my own one - D.
• So You want one? - me
• YEEEEESSSSS!!!!!!!! - D.
• Me to, me to. - added M.- twin sister of D. [...]
• Why I don't have an account? I have to use tablet and phone - my wife
• Ok You will have one - me

So now my PC have 4 accounts instead of one:
1. Mine
2. D.
3. M.
4. My wife

It was mine old laptop with one small account, now it is a family laptop :)

Anyway I setup Microsoft Family Safety - I am really interested how it will work.