13th Birthday.. Ttly Fun Or Ttly Dumb??

Hello! I`m Izzy well this is my idea for my 13th bday: Rent out the nieghborhood clubhouse for only thirty five bucks. Borrow some speakers, bring my ipod/CD and ttell my firneds to bring some of their CDs/iPods too and crank up the jams. I`m inviting 40 ppl guys and girls and then my best frined will sleepover. If everyone gets bored dancing there is a huge patio, tons of running room, and a volleyball court in the area of the clubhouse for just hanging out. I always think the best parties are the ones i can just go to and hang out with my friends (like school but no work and outside). Im also considering getting a whole bunch of whipped cream and water balloons and just kinda go crazy (outside, of course). Good idea or bad? I`ll be happy to help others with ideas if u help me!!! :D