Template (this link has the BEST superhero party breakdown I have seen- tons of easy crafts and great ideas).
Make a DIY no-sew superhero cape for kids More
DIY Tutorial: DIY Batman Costume / DIY Batman Cape - Bead&Cord
do it yourself divas: DIY: Batman Cape
DIY Batman Cape DIY Halloween
DIY Halloween Costume : DIY Batman Cape and Mask DIY Halloween
DIY Tutorial DIY Batman Costume / DIY Batman Wear: Cape and Mask for Kids - Bead&Cord
do it yourself divas: DIY: Batman Costume