We saw a picture of something like this on Pinterest the other day, so we decided to create one to match David's favorite team.
Simply take one paper plate and cut it in half. Cut little slits in the plate to resemble a face mask.
Using another paper plate, paint the outside of the full paper plate for the helmet.
Next, paint the face mask. Then, have your child draw eyes and a mouth on the large paper plate. When the paint is dry, glue the face mask to the large paper plate.