This is my flying Captain America shield, which I made from duct tape and cardboard. I have posted full instructions and a free pdf pattern for all the pieces here:
http://www.instructables.com/id/Flying-Captain-America-Shield/
Note: You do NOT have to be a member of instructables.com to download the pattern for making this shield. Look for the attached pdf in step 1 ("capshieldpattern.pdf"). Let me know if you make one!