Altough it's quite far away, I'd like to start thinking of ideas for a themed birthday party. I've come up with a few but I need some help. Thanks

Also, please note i am British and may not be familiar with some American ideas! (Not sure if this is a British/American/other site or not!)

for my 14th birthday i had a house party they go down really well and we all jst had music playing a bit of food and did anything basically... and my parents went out if you can get them outa the house!!