prepare in advance. get loads of mason jars, fairy lights, pillows, sheets, candles, and make your room (or wherever) set up completely . look up on tumblr room ideas for lighting and stuff, get bean bags and stuff to crash out on. make sure to have lots of snacks and stuff. If you want it to be creative, you could bake something with your friends like cake pops, maybe do each other's hair with hair chalk, just watch movies and shows together.

Just make sure to plan everything out before hand, like the shows/movies you might watch and how everything's gonna look.

https://www.google.co.jp/search?q=tumblr...

everything looks pretty cosy ^^^

Have your parents pay for a private chef to come over and prepare a special unusual meal and dessert for your group; and maybe the chef can give you a mini cooking lesson on how to do it.

beach theme,, great idea for your age. if you and your friends and the beach type of people, interest you have are great for themes

make it simple,invite your frends and have a blast...

I want to have a sleepover with a few of my friends (approx. 7) but I want to have a theme to it. something creative and tumblr type of style. the party will take place in the beginning of September