Cut a sword shape from cardboard and cover it with silver duct tape.
Cut a handle (shaped like a “T”) from cardboard and cover it with black duct tape.
Attach the handle to the blade using duct tape.
Measure and cut two 4-inch strips of black duct tape. Layer one over the other slightly to create a small sheet.
Fold the sheet in half so that no sticky edges are showing.
Cut the double-sided sheet into a patch. Use another small piece of black tape to attach a length of yarn long enough to go around the child’s head.
To assemble the entire costume, dress child in dark pants and white t-shirt. Cover the shirt with red duct tape stripes.
Tie bandana around child’s head and tuck in any edges sticking out.
Tie eye patch around head.
Have child carry sword.