Captain America's Shield, now to print with three colors! This is a remix from mming1106 Shield (http://www.thingiverse.com/thing:160078). I have separated the shield into four different pieces that you can assemble, and I have reduced the size to half, perfect for a keychain.
The white ring needs a bit of glue and fits perfect on the red base. Probably you need push the white star into the blue part to make them a single piece, but it fits, just force them a little. Then use glue again with the red part.
You can make a simple shield or a keychain, use the red part you want.
Update: If you want the keychain assembled, for print in a single color, print the "assembled.stl" file.