Children should be cared for until they grow up. As a father one must take proper care of the child. Children must be kept away from places where addiction may occur if he does any work. There is definitely a minimum age requirement for gambling, but if a child is interested in gambling, he can quickly become addicted to it. So, he may not develop normally. But when the child grows up and if they are gambling they will know better about their benefits and harms. So children should not be introduced to gambling until they get fill the minimum requirement of age.
Children should not see how we are addicted to gambling, this will in any case be a bad example, no matter how successful you are in gambling. Children tend to copy us and one day they will want to repeat it after us, but without the proper skills this will not bring any good results. If you see your child has a craving for gambling, then you need to talk to him about it, explain all the difficulties and let him make the decision himself.
I personally have my own personal conditions which my children must meet before I allow the child gamble under my roof..
First is that, the child must be above 18 years of age..
Secondly, the child must already be done with schooling,
Third, the child must be working, or job hunting atleast..
A child can not be totally idle under my roof and be gambling, I will never allow such.