How to Train your Dragon 2 is an exciting film ! The winning designs were the gliders that offered that similar exciting experience. I mean , who didn't get in trouble in their childhood for having too much fun throwing paper planes in the classroom? :D
Working on these toys, about 2 years ago I was learning the ropes of toy design pipeline with this project: visualizing concepts as well as representing them professionally, creating production artwork (sticker sheets and pictograms for how to use the toy); revising prototypes with redline drawings etc. etc.
I remember the engineering team doing their absolute best to find the perfect balance between the weight of the plastic and shape of paper wings to make it fly with confidence. Very rewarding when it all worked out well in the end.