Pink. That's all we really need to say about ballerina-party décor. You don't even have to buy anything specifically ballet-themed -- just get pink. Tablecloths, streamers, utensils, cups, paper flowers, balloons, whatever strikes your fancy. Of course, you could add a ballet touch here and there with tulle-wrapped chairs or chains of paper ballerina dolls, and a tiny post-performance bouquet for each guest is always nice. But you don't need to over think here -- when in doubt, stay simple and stay pink. A little glitter and sparkle never hurt anyone, either.
To keep it easy for you, we're going to suggest you stay on the same mental track when you're thinking about your party food.