Party party

I'm about to hold a birthday disco party for about 30 twelve year old kids. Does anybody have any suggestions or advice to give so that the whole event goes smooth and everyone has a good time.

yeah you could take them somewhere fun or play musical chairs. if its a daughter or sons bday party, then ask him/her their fave songs to listen to so the other children can dance to it

well you need to make sure theres more than 1 person taking care of these kids
because you alone cant care for them and have your eye on them all at once
so there needs to be more than 1 adault looking after the kids and keeping an eye on them

Thanks for your answers.
It's my daughters birthday and we've bought music and I'll ask her what games she wants to play, although it's hard with a twelve year old, she's too old for pass the parcel and I won't let her play spin the bottle.lol
And I'll certainly have more than one adult there. There is NO WAY I would try to handle thirty kids by myself.