MY SWEET SIXTEEN

Hello, Im having a sweet 16 in this coming (late) Julyy. I wanted to be able to come out of a cake as a giant surprise to everyone :] but i have no idea how this all works. I dont wat to just pop out of it and ruin it though, I want to be able to pop out and get out without ruining the cake, real cake. Then be able to serve it lol. I also had an idea for the theme of my cake, leopard print. And I really need help with this idea and good pricing. Thank you so much!!!!!!!