Environment influences kids so if they see grown up doing it, they will also be doing it. I for example grew up where my parents are not around but with my brothers inviting a crowd under our basement and play cards and billiards. Its not surprising that even my sister knows how to deal cards like a pro.

So if gambling is exposed to children, its got an effect on them but the good part is that they learn and may not be addicted to it when they grew old. Because the interest of the kids changes over time.