This piece could inspire dozens of new ideas. It could be a classroom project or a travel journal piece or an ongoing journal of your children's drawings of houses that are eventually put into a book or collaged onto a large artwork like this one.
StarEsStar posted Smash Book Doodle Ideas: Make simple shapes (circles, squares, rectangles, etc). Once dry, make doodles and drawings outlining the shapes with black pen. to their -doodles- postboard via the Juxtapost bookmarklet.