Search Results: birthday party ideas

So my little sister is turning 18 years old in December and I want to throw her an AWESOME birthday party. I didn't really do anything special on my 18th birthday so I want her to have a memorable 18th birthday party. that's why I was thinking of doing like a wild scavenger hunt in the downtown san diego area. Most of her friends can drive so that won't be a problem, and ill be driving too. I was thinking her friends could split up into teams and do a bunch of crazy tasks and document them with pictures or videos. I think it will be really fun but I need help thinking of ideas for it. I have stuff like "get someone to sign your leg", "re-create a famous movie scene", "gagnam style or sloppy swish in public", "get a bag of sand from the coronado beach", "get a strangers phone number", "find a twinkie" and a bunch of other stuff. I was thinking the harder the task the more points it could be and at the end her and her friends could count up points and see who wins, then come back home and watch a movie or something. Has anyone ever done anything like this before? Do you have any suggestions!? I really need help planning! and I also need suggestions that couldn't take place in a mall, because a lot of the ones I have right now could all be done in a mall and I want them to be all over downtown... thanks! (oh also it will be a group of about 15 girls)