This final step of the unit will take the class to the edge of the Universe. To do this you will need an open area 400 meters long, a city park or a long open road should do.
Take the supercluster out to the selected area and start measuring off 200 meters in one direction from the supercluster. Leave one of the two extra local clusters set aside earlier at this 200 meter spot. Repeat these steps in the opposite direction from the individual local cluster so that the supercluster is in the center of the two individual local clusters. Refer to the drawing below for clarity. The class can now get a good idea of the size of the universe if they can imagine our Milky Way Galaxy as one of the tiny Styrofoam chips in the center of the supercluster and the two individual local clusters as the outside edge of the known universe. Congratulations on reaching the edge of the Universe!
(figure available in print form)