I got this lesson from http://kidsartists.blogspot.com and just had to make them with my 5th graders! The main focuss was on texture. I put out boxes of stuff and the kids had a great time stacking their sandwich items. First, we made the table cloth and plate. Next, we added the bun which is made from torn up cardboard, so that the ridges show. Then they had to fill the space between the buns! The kids had to be reminded that the items had to look like a food item. They couldn't just glue pink tissue paper on "just because."