These are some whimsical haunted houses my mixed Grade 4 - 6 students completed last year.
Students started by sketching their drawing in pencil on black paper then went over it with white coloured pencil (we call them pencil crayons in Canada!). I highly recommend using Prismacolour for this project as the quality is so much richer. I'm also a fan of Crayola Twistables.
Then students coloured them in.
Some finished Grade 4 - 6 artworks: