Fun INSIDE party games/activities for teens and younger kids?

Sooo, now it's supposed to storm tomorrow, on the day of my graduation party that was planned entirely outside. I have ten teens (including myself), a 10-year-old, and an 8-year-old to entertain. I really don't want this party to suck. Excluding the younger kids is not an option, so everything has to be appropriate. Ideas, please? Thank you!

Anonymous2014-06-20T16:52:13Z

You can have a movie marathon.
An eating contest.
Makeovers for girls.
Boys vs girls contest of some sort