It's simple: substances known suddenly show, at the nanometric level, completely different qualities. In Figure 1, an example of a teaching poster.And this allows always new and innovative uses, such as for self-cleaning surfaces,for stronger and lighter building materials, for increasingly safer car tires, and much more. In figure 2, another example of a teaching poster.
(figure 2)
This is why the European Commission has developed "NanoYou", a specific project for nanotechnology education. The site of the NanoYou project (literally, Nano for Youth) has been active since 2010, dedicated to nanotechnology teaching.