My Son`s Wedding

My son is getting married on September 7, 2007 and he and his financee have both been working very hard to pay off thier wedding and I am proud to say that they have paid alot of it off..sad to say that they are about $2000. Short. I would like to give my son a gift and be able to just pay the rest off for them but I am barely getting on my feet. I would love nothing more than to be able to help..please help me figure something out to do in such little time.