Cut out a few pics from a magazine,
glue them on paper
and give them to your kids-
telling them to fill in the rest of the scene.
It's fun to hear the commentary
as the scenes in their imaginations are drawn out.
***UPDATED*** When I checked on them, a while later, I was happy to see that they had looked in the mag for more pics to cut out and had even added written storylines to some of the new scenes.