Princess Catherine led a lesson on emotions with children from a mental health charity in London.

She used an emotions chart to teach children about feelings and coping mechanisms.

Her involvement in mental health charities began in 2013 and she has been a strong supporter since.

She supports a few charities through her foundation, unlike royal patronages.

She is interested in early childhood development and has worked with experts in neuroscience and social services.

Her work will equip the public with solid evidence for policy change related to children's mental health.

She is a hit with children and parents alike due to her approachable and respectful demeanor.

She models pedagogical tools for emotional communication that parents can use with their own children.

Kate's work on children's mental health is a big part of her life's work and will likely continue to be in the future.