I put together this Sensai Wu costume for my son last Halloween. He already had a karate gi. I used a square paper plate and painted it yellow, cut eye holes, drew on black cheek and forehead lines, and glued on a white beard we purchased. We used an elastic band hot glued to the back of the mask to keep it on. For the hat, we created a small cone out of poster board and glued burlap to it.