We just did this a month or so ago. My wife’s old Pixel 4a got a data-only SIM, and we locked it down extensively with a profile for each of the older kids (9 and 7). Websites and apps are allow-only. They can call or text us through Google Chat, and we also allow Pokemon Go and a couple of other things. We call it the “Family Phone,” and they don’t have unlimited access to it, but it’s handy to have something to hand them when they leave the house without us.
We just did this a month or so ago. My wife’s old Pixel 4a got a data-only SIM, and we locked it down extensively with a profile for each of the older kids (9 and 7). Websites and apps are allow-only. They can call or text us through Google Chat, and we also allow Pokemon Go and a couple of other things. We call it the “Family Phone,” and they don’t have unlimited access to it, but it’s handy to have something to hand them when they leave the house without us.