What activities should I have at my dance party?

So, it's the end of school...and me and my good friend (she's a girl, I'm a guy) are planning on having a party for our birthdays on the 17th of June. A dance party at my house is what we're thinking of...but I'd like to know what activities to have at the dance party? We're both 13 by the way. We could buy an above-ground pool, or have badminton outside, but I'd like to hear other's ideas. Please help me (: