As I have also tried to see if this is real or not, I research about it and yes at the age of 5, they are legally allowed to gamble.
It's hard to think whether the kids know what they are doing or where they get the money to play. But I think they should be more strict when it comes to the legal age of allowed gamblers since it is not proper for kids to grow in gambling.
Seriously? I can't believe that, a 5 year old kid cannot think well, they are not full developed mentally and besides how they are going to play in casino gambling, how could they bet, they are so young, but thankfully they implemented age restrictions to protect our kids.
I think the legal age is 5 years old, but it is possible that they still have some restrictions like they are only allowed if they are with their guardian. Also, I don't think a 5-year-old kid will go to the gambling house by itself without knowing anything.