I use this assignment as a cumulative task for my sixth graders.
The students build airplanes from the website "Fun Paper Airplanes"
(link: http://www.funpaperairplanes.com/). They choose one template, build it, test it, and make any necessary changes (adding paper clips, straws, tape etc.).
This 'docx' file is editable.
Aligns with the Ontario Curriculum (Grade Six, Air & Flight).