A.D.
Look at Oriental Trading. They have plates, cups, etc High School Musical theme plus a question and answer game. I personally havent seen the movies but did they eat anything in particular that you could possible serve? Of course you can do relay races and hand out prizes. I wouldnt make too much of it, the kids will entertain themselves alot at that age. Maybe get the sound track and have it playing in the background. I can't think of too much else at the moment. Hope this can get you started. Good Luck!