I am not old enough.
And you really care about that? Plenty of people play online and it is forbidden in their place. In the US almost every online casino is banned and people don't give a damn about it.
Just look at gambling section.
I personally wouldn't recommend gambling - unless your playing a "skill" game (i.e. poker) it's not going to be worth the time. You're more likely than not to lose money (given the -EV) so unless you don't care and just want to play based on luck I wouldn't gamble. As a kid, earning money is just about getting a job (probably going to be minimum wage slave labour but its about the only way at a young age).