this is a fast accurate plane when made right, i found this plane on the net, not sure where though but all the credit should go to him.
Step 1: Step 1
materials: 1 A4 bit of paper and your hands.
fold it in half long wise to make a crease. un fold and then fold the top two corners into the middle.
fold this new triangle keeping the apex of it in-line with the middle.
Step 2: Step 2
now fold the top 2 corners into the middle so that you should still see the tip of the big 1st triangle.
now fold the little bottom triangle up.
fold the plane in half BUT make sure the little triangle you just folded up is on the OUTSIDE.
fold the wings about 2-3cm from the bottom.
tada! now it will fly fairly straight.
Step 3: Photo