This idea has been around as long as the web, but you can't get momentum behind it.
A much better idea was a .kids domain where the content was vetted, and you could allow-list your child's device to that. Much easier than trying to migrate everyone over to specific TLDs, especially when that ship has sailed already. But that never got traction either.
Edit to add: I used to work on "family safety" software. Blocking bad content doesn't work - it's too difficult of a problem. Walled gardens do work, however. The fact that there's not a push for the equivalent of an Apple App Store for kids is probably evidence of ulterior motives on behalf of regulators.
I haven't tried this because I haven't played Magic in over 20 years, but I always thought it would be more fun if you had two draw decks where the second was only allowed to include basic lands.
Then in the draw phase you could choose which deck to draw from, eliminating the mana flood/drought possibility that ruins games.
Maybe some additional rules to limit how many lands you're allowed to draw in the initial draw to one or two, I dunno.
Started at age 7 on a C64. I learned binary before I could multiply because you needed to understand binary to create multi-colored sprites on the C64. I made a game where you drove a car and avoided things, then another where you drove a spaceship and avoided things, then another where you shot arrows at moving targets. That last game was the first one I wrote where the goal was to hit things, a major departure for me. Those were the days.
Despite the advances in tech, kids today who want to learn to program have it much harder.
A much better idea was a .kids domain where the content was vetted, and you could allow-list your child's device to that. Much easier than trying to migrate everyone over to specific TLDs, especially when that ship has sailed already. But that never got traction either.
Edit to add: I used to work on "family safety" software. Blocking bad content doesn't work - it's too difficult of a problem. Walled gardens do work, however. The fact that there's not a push for the equivalent of an Apple App Store for kids is probably evidence of ulterior motives on behalf of regulators.