For the invitations you can buy cute princess themed invitaitions at Party City or make your own by using clip art.     For the decorations you can buy princess themed things like table cloths, plates, cups, etc. that you can buy at Party City or get a lot of single color pink things also at Party City. You need a room for the Ballroom, a dining room, a dressing room, and a game room. For the Ballroom you should have a big area for dancing. For the Dining room you just need a table to eat on and put a princess table cloth that you can get at Party City. For the dressing room it shold be the child's bedroom and you should lay out fancy looking dresses- if you want you could ask the parents to bring fancy looking clothing.All the game room needs is a kind-of big space.      First the girls need to get dressed in their fancy clothes and get ready for the Ball. If you want you can curl or straiten the girl's hair. Then you will start the Ball. The girls can dance with eachother and there should be snacks at a small table.      There will be a couple games. The first one is Balance Book where each girl has a book on their head and they all try to get to a pair of gloves and whoever gets there first without having the book falls wins the gloves. For another game you can play Master where you pair up the girls and they have to pick who they want to be A and who they want to be B. Then you can pick A or B to be master and the other is their servant. The master would say something like get me some tea nad the other would make an imaginary tea and give it to them. This goes on for 2 minutes and then the servant becomes the master.      For party snacks there should be things like those small sandwiches that they have at tea parties and cut up hot dogs that you can dip in Mustard or Ketchup. The kids can have pizza for their main food.     The cake can be a regular cake or an ice cream cake but there should be a crown on it.      For favors everyone should get a crown and some jewlery or some sort. I hope you like my idea. If you dont have a Party City near you you can go online to partycity.com and go to theme parties. Then you will find princess stuff.