Thunberg says she first heard about climate change in 2011, when she was eight years old, and could not understand why so little was being done about it.
For about two years, Thunberg challenged her parents to lower the family's carbon footprint and overall impact on the environment by becoming vegan, upcycling, and giving up flying.
Global Eco System Activist, sounds like something an eight year old would be interested in learning about.
Wikipedia link full transcript
https://en.m.wikipedia.org/wiki/Greta_Thunberg