But how can such an idea become a source of wonder? Depending on students’ grade level, a teacher can present the ‘secrets of matter’ (through a story about what matter ‘really looks like’—if we could use an extremely strong microscope) or the evolution of ideas about matter (through narrative or storytelling) followed by a few illustrations of how such a relatively simple idea can explain a wide variety of phenomena (e.g. evaporation, contraction, melting).