Or have permission from your guardian.
I would like to point out that Cubecraft is mostly PVP based, which mean there will be a ton of toxic people, in game killing involved and that's kinda violent.
Not to mention there will be players who will swear (even though it is against the rules) and such, you will be exposed to all that and I'm sure some parents will not like that idea.
Imagine a 10 year old playing GTA V and the game influenced his behavior, the parents will get upset.
"Who allowed my child to play games like these?! I demand to speak to the people in charge, IMMA SUE EM'!"
You know? Just got to be sure of the circumstances and things like that.
Just give a run-down to your parents about what Minecraft cube is about.
In before some parents starts private messaging us to bring things to court. I joke
(it happened a few times on another server before though)