From what I can tell, one of the crazy things in this world is that a paper aeroplane, flown outside, is covered by the Air Navigation Order and regulated by the Civil Aviation Authority.
What makes this especially crazy is that you can now buy a drone that is smaller than a paper aeroplane!
This drone has no camera, so is pretty much OK to fly around outside, but my grandson is getting one for his birthday which is only a fraction larger and has a camera! That means it is subject to section 167 of the Air Navigation Order and will actually be ILLEGAL for him to fly outside his home (being a congested area). It too is smaller than a paper aeroplane!
What a mad world in which we live - not just in terms of amazing technology, but amazing laws...