Halloween Costumes

My dog is pretty big, and he is going trick-or-treating with us.
Well, me, my dad, and my three cousins are all going to be crayons.
All different colors, and we are home making the costumes.
We need to know how to make a homemade crayon costume for him.
Here is a picture of him: http://i336.photobucket.com/albums/n328/sheltond2/Delaniespictures107.jpg So how could we homemake a crayon costume for him?