13 year old birthday party good or bad idea?

Okay so I have another question on here about what to do with my birthday party and someone replied and said something about a SCAVENGER HUNT at the mall. I don’t think it would be babyish at all or anything if my mom can make it hard for us. i still have to ask her about it. But i REALLY like the idea. Here is what i typed up about the party so far:

Scavenger Hunt Rules:
1. You have one hour to find as much as you can on the list.
2. No help from the other team.
3. Each list will be scrambled up from the other so you won’t run into the other team.
4. Stay on 1st/2nd floor only. Maybe
5. Once you find something take a picture of it with a digital camera/phone
6. When were done meet at 1st floor JCPenny entrance.
7. The winning team will get king sized candy bars.
8. After the mall go to my house for b-day cake and presents OR
Sit at the tables in the mall and do presents and cake/ice cream there.

If you like this idea please tell me and oh and I am a girl and I will…..
okay so i will be inviting somewhere around 6-7 guests not including me so 7-8 total. What do you think about chaperones? i m an only child so idk about that. Please e-mail me on my yahoo. or reply to this or send me an e-mail @ hilary_gurl@msn.com please i really would appreciate all feedback i need a really good birthday becuase all my others in the past pretty much bombed [sucked] thank you sooooo much!!! i need all the help i can get even if ou think your answer is dumb post it any way and check out my other question:

http://answers.yahoo.com/question/index;_ylt=AqmYKxSXOSWF0uTFPAVU9hDsy6IX?qid=20070706133610AATHjyq

oh and i am only inviteing my closest friends and they are girls.