I'm Going Out Of My Mind!!

So Nikki and Kim have been tourmenting me with the idea of this surprise since last nite...these are the clues I have as of now...

Lasts a week
Not an animal
It's not a piercing or tatoo
Kim's not allowed to do it
Nikki's dad will kill her
It's cost $500?!
She had to call them
It talks
It's human like
It deflates....
Has 6 legs....
The memories will last forever
it's 150-200 pounds
It took them 6 hours to find it.

Can u draw any conclusions from this??? I sure as hell can't. It better be good and I best not be dissapointed lol. Looking forward to tonite...kinda....I'm scared.