I teach form and sculpture to k-5 students. The sculptures that we
look at are any that have obvious open and closed forms in them, Moore
for closed and Calder for open are good examples
I also take my classes to the sculpture garden in Minneapolis and
there we do the scavenger hunt for certain sculptures that we are
given clues to find. If you were to make your site with a scavenger
hunt type of game it would attract the students.