Any good and creative Fund-raising Ideas?

My church youth group is planning a missionary trip which is one month from now and we need to raise a lot of money. Is there any really good and creative fund-raising things we can do at church that will raise us a lot of money in a short period of time? We're already doing car washes, and selling food at festivals as well as painting faces. We really need some ideas Please. Thank You! God Bless!(: