Here is a really brilliant helicopter.
The long strip is folded in the centre but at an angle to make a ‘v’ shape.
Then a paper rectangle about 10cm x 5cm is rolled and taped to make a tube 10cm long.
Two scissor cuts are made in the tube so that the ‘v’ can be pushed in. Some tape can be added to secure it if it keeps falling out.
Now experiment with bending and folding the wings so that they resist the air as they fall.
When it is allowed to freefall through the air it spins very quickly and this slows the descent.
See how long you can get it to stay in the air.
Try longer or wider wings
Try a longer or wider or thiner tube.
What else could you try?
Would any other shapes work?
Do you think this is how Orville and Wilbur Wright started?