Step 1: You Will Need
Lolly (Popsicle) sticks (or more cardboard)
Step 2: Main Body
Now cut out the body-shaped cross section-from Popsicle sticks stuck together (or use cardboard). Stick this down. I used hot glue.
Now cut out two fins to go at the back on the top. When you stick them down, be sure that they have the same angle.
Step 3: Underside
If you like, you can take some dowel and stick it from the underside body section to the nose.
I added a fun snap (banger) compartment zone under the nose, so when the plane lands, there will be a loud, small explosion.
Step 4: Finishing Touches/Tips
Stick elevators on the back of the wings from cardboard, or a Popsicle stick.
Keep the wings folded up slightly.
If plane won't fly straight, adjust elevators, or make one side slightly heavier or less heavy.
Use lots of glue, so it stays strong.