Knossi Casino age rating?

A friend of my son (13) told him about a casino streamer on Twitch. His name is Knossi. He has also told him that this streamer has an online casino where you can play for free without real money and can win vouchers in the form of real money. There will also be prizes there.

You can also set how long you can play there, or a time after you have to enter a password to continue playing.

I would then hire my son about 20 minutes, because it is still a casino from which one can become addicted.

Now my question: is there such an age restriction, because you do not use real money.

And I also know casino games for PS4 and PC where even you can buy real money chips. But these games are free from 0 years.

For example, on PS4 it's called a game called "The Four Kings Casino & Slots." There you can buy coins with PSN (Real Money) credits, but the game is still 0 and over.

If that goes in the Knossi casino but I would ban it. And only about 20 minutes a day.

What about the Knossi Casino?

Is completely free