I basically accept any chance I have to talk about science and astrophysics
(in my CV you can find the full list of public outreach talks)
With some friends/colleagues/students from the Instituto de Astronomia (UNAM) we created:
"Estrelleros: Astronomia en hospitales"
... we gave astronomy talks and activities (planetarium + many other activities) to children in hospitals.
It has been an amazing experience!