- Have students work together at this center to come up with what they feel is the most important scientific discovery/invention of the millennium. - They should write about their selection explaining why they chose it and what changes it brought to society. - They should then make a 3-D display of their chosen invention. You may want to have material for mobiles, styrofoam pieces, pipe cleaners and other materials available. - Have groups present their choice to the rest of the class and display.