This is why I keep all my magazines! I remember using magazines multiple times for school projects! But this-Really cool idea - cardboard doll house with magazine pictures. Could do with a firehouse/something more boyish, too.
Divide a sheet in two pieces. Cut houses out of constructionpaper. Glue them on the upper half of the sheet. Paint the same houses below the glued ones, suggesting the reflections in the water. Balance and symmetry lesson