Children could draw plans for their ideal building and then work in small groups to combine their ideas to come up with one design. We could photocopy/project their image onto the wall and children could paint together (using step ladders?
Experiments in Art Education: Collaborative Mural Painting.give students watered down black tempera paint to start making shapes. Connect shapes with variety of lines. let black dry and fill in with colored paint.
Aluminum foil and sharpies! Sometimes the best result comes from the simplest medium.especially with kids --------------- this was not actually done with a roll of "aluminum foil" but with heavier aluminum; such as pie pans cut up - still really cool