  We report mainly on the global flagship outreach activity in particle
physics: the International Particle Physics Masterclasses. It is illustrated on
the example of Slovakia and the Czech Republic. The Masterclasses are described
and their long-term impact is studied with the help of a survey among former
participants. The positive effect of Masterclasses in shifting the attitude
towards science is shown. We also discuss the modification of Masterclasses for
a pandemic situation. Finally, we present CASCADE projects as a way to foster
the interest in a field which has been strongly enhanced by previous
experience, e.g., at Masterclasses.
