[Source: Your Kids OT]
Paper planes appeal to kids (and adults) of all ages. It may be something you did as a child with a grownup helping you to perfect a great flyer.
You may not have stopped to think that paper planes encourage visual motor planning,bilateral coordination (using both hands together), and fine motor accuracy in executing the folds. They are lots of fun too!
In the Miller Function and Participation Scales there is an “origami” subtest that measures this against age appropriate norms. Miller describes the skills needed for this activity to be similar to participation in home activities (eg. folding towels, napkins, clothes or the newspaper) or school activities (eg. turning pages in books or folding paper for art projects).