You are allowing your child but still with a proper restriction and guidance because of course at a very young age they think this is the normal thing and once they see the excitement, enjoyment and satisfaction by doing this they might do it as part of the daily routine and hobby which can be a risk towards the future of the child but still with your guide I guess you can manage those things at the very young age enlighten about this gambling can be good in a way depends on the decision of the parent or child itself.