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.
It is quite surprising that a country has set such a low age restriction when it comes to gambling since in many countries you cannot gamble until you are legally an adult, personally I think age restrictions are a good idea, I like gambling and I do it from time to time but we need to be very responsible about it and a kid does not have enough maturity to know that what he is doing may have a negative effect on himself and his future if he does not control himself.