I just remembered that I love this idea ... watercolor background (could
be scenery, like a desert bluff or a lake with grassy banks, whatever)...
Next, draw and cut-out people or other things to glue into the background
Sometimes the kids like to paint a rather seriously beautiful background,
but then draw cartoonish or alien characters to glue into the picture.
The contrast of styles is interesting.
Opposite: Paint a cartoonish background, draw and cut out more realistic
things to glue in.