Making a paper airplane

The dynamics of making a paper airplane have gone beyond me. Working with kids esp boys is not easy when you don't know what makes them tick. So today a lil boy come to me with a huge and i mean huge piece of paper (bigger then A3). "Please make me a plane that will fly?" and here i was thinking to myself i can just about make an A4 airplane that flies how am i going to manage this one. So i did my usual folding and gave it to the child. but did it fly? No the silly thing just landed flat on its nose. "But it doesn't fly?" the child asked. And here i was thinking to myself i don't know how to make one that flies. So i tried again and still it didn't fly. :( So now i am stuck with finding out how to make such a big air plane that will fly.
If you a boy reading this and have tips or idea's they are most welcome. Please :D