When a nose accidentally breaks off one of the faces on Hero Hill, our heroes must figure out how to repair the monument. Sparks' Crew makes various sticky mixtures, hoping to find one strong enough to stick the nose back on. Curriculum: When two or more substances are mixed together, the resulting substance may have different properties than each material on its own. / Sparks' Crew tries to help change a broken wheel on a hot dog cart. But, with Sara playing "teacher" for the day, how can they lift the heavy cart without her so they can change the wheel? Curriculum: Using a lever can make it easier to lift a heavy object.