I need to raise $6,500 by May 2012 how can I do this?

I am 13 years old but will be turning 14 soon and I need to raise $6,500 to cover my part of my dream trip to Ireland that my grandmother is going to take me on, but I have no idea how to raise the money and my parents can't help at all. Please no stupid answers like robbing a bank. Please help!!