Simple. A paper airplane.
I had this idea in school while making, duh, a paper airplane. It should be lightweight and not very tough.
I had two ideas for it
Idea 1.) Acts more like a plane, has a fairly slow or average speed and can propel its self into the air.
Idea 2.) Acts more like the hang glider, its distance depends on how high it is and it speed depends on how steep its flying down. This may be harder to get started unless its an item, not a vehicle.
Overall, the choice of the two ideas is up to the person who is up to making it. I think idea 1 is ore practical for a party of people flying around. Idea 2 should be more if it was like a "paper airplane simulator." Thanks again if this is done.
Oh and the design of the paper airplane is up to the creator.