This image is interesting to me. Firstly it shows that paper airplanes (for whatever reason) are getting less and less interesting to people over time as a proportion of what is being searched for online (the red line). I think there are a lot of reasons for this but in the end kids are getting more and more into computers. Analog entertainment like paper airplanes are just not as cool as angry birds.
The second trend that is interesting to me is the only growth keyword (amongst the major paper airplanes keywords) is “how to make a paper airplane”. This definitely fits with the general refinement trends I am seeing across all of my sites and work. Queries are getting more complex and specific.
Also it’s irritating that this is a query I lost a few years ago and still haven’t won back :)