We started drawing the same as if it were a hallway but then I challenged the students to think about it being the bottom of a hole. . . and they were going to be stuck in it. I took pictures of the students sitting on the floor while I was standing on a table. After finishing their images (one day with pencil shading and one day with colored pencil shading), we cut out and glued in their photos.
don't worry... we got them all out.