INVITATIONS~ For the invitations, I typed them up onto Word and used a whimsical-looking font. I printed them onto A4 paper that I had aged using teabags. I also added the Hogwarts logo and signed (as Minerva McGonagall, Deputy Headmistress) the invitations by hand for authenticity. The invitations read:  HOGWARTS SCHOOL OF WITCHCRAFTAND WIZARDRY Headmaster: Albus Dumbledore(Order of Merlin, First Class, Grand Sorc., Chf. Warlock,Supreme Mugwump, International Confed. of Wizards)  Dear Miss/Mr ______,We are pleased to inform you that you are invited to attend Hogwarts School of Witchcraft and Wizardry, where we will have a special birthday celebration for Head Girl/Boy, (birthday child's name).Term begins (day), at (time). Take the Hogwarts Express to (address). We await your reply by owl no later than (RSVP). Sincerely,(This where I left a gap to sign 'Minerva McGonagall')Deputy HeadmistressMuggle (non-wizard) attire is appropriate. Term will end at approximately (end time).  DECORATIONS~ Because I had a reasonably low budget, I decided to make most of my decorations. I found a lot of ideas online, and had a great time making the decorations. I would advise that you start making the decorations AT LEAST a month before, because then you have a lot of time to organise food, games, and other things like that. The first thing I made was a Platform 9 ¾ sign for my hallway. I put this on the wall, next to an old suitcase, an empty birdcage, and some brown parcels with labels that said 'H.POTTER' on. I also made a common room notice board by aging paper and writing things such as 'MISSING: One copy of 'Quidditch Through The Ages' If found please return to Neville Longbottom' and 'Gobstones Club Meeting Times', ect. I asked my parents for help with this so that all the notices had different handwriting on. I also made some flying keys by simply drawing the outline onto cardboard, cut out using a stanley knife, and spray painting gold. I used the same spray paint to make snitches, which were gold table tennis balls painted gold, with wings. One more thing I made was a Hogwarts Crest, which took longer than I thought. I got a large piece of cardboard and drew the four houses and the iconic 'H' in the centre. then I painted several layers of paint on, because the cardboard absorbed a surprising amount of the paint. At Halloween, I also bought some plastic snakes, rats, and spiders from the pound shop, along with a plastic cauldron and golden balloons. I also bought some coloured card, which I used to make book covers from the series, such as '101 Magical Herbs & Fungi' and 'Magyk Moste Evile' and 'Magical Me'. These really added to the atmosphere. ACTIVITIES~ For activities, we were 'sorted' by choosing a coloured badge from a fabric bag, which was then pinned to the person's clothes. After this, we also did some fun games such as 'Harry Potter A-Z' where you hand out a peice of paper with the alphabet on, and split up into pairs or teams. Then, the first team or pair to come up with a spell, character, and place beginning with every letter of the alphabet win a prize. We also played Who Am I, where the person has a picture of a character on their head but they don't know who it is. They then have to ask questions to figure out what character they are. Finally, we had some general HP trivia questions. GAMES~ The best game that we played was Quidditch, using rolled up newspaper and balloons. Also, hidden around the room were 10 'golden snitches' that the seeker from each team had to find. 10 points for each balloon shot through the hoop, and 30 points for each snitch found. The game ends when all the snitches have been found. After this, we watched the film to cool down a little. COSTUMES~ For my party, I decided not to have costumes because I wanted it to be as cheap and low-budget as possible. PARTY SNACKS~ For snacks, I found lots of recipes online. I also bought sweets and made magical looking paper. For example, I bought Bean Boozled Jelly Beans, and labeled them as Bertie Botts Every Flavour Beans. I also rolled lollies in pop rocks for acid pops. CAKE~ For the cake, I baked a chocolated cake and iced it with chocolate. Then, I used green icing to write 'Happy Birthday Lily' on, just like Harry's. FAVOURS~ When the party ended, I handed everyone a party bag. In the bag, there was Harry Potter glasses, Dark Mark Tattoos, Birthday cake, stickers, and a snitch.