13th Birthday Part Ideas!!!! Need!

Ok so my birthday is gonna be on saturday of next week but i have no ideas.. I have a about almost 23 girls that i am inviting i was thinking that i could have all of us go to lazer tag. And then we could come back to m y house and my parents would buy a scrap book and everyone would design a page for me and i would put it in the scrapbook and keep it but they are all gonna sleepover but what else should i do!???