What paintings would teens identify to on the walls of a mental health/emotional support centre?

I've recently been asked to paint a mural style design all round the lobby of my local YESS (Youth Emotional Support Serices) charity's new building. They've recently upgraded from my school's basement to a more accessible building in town for children and teens and are hoping for my work to help them feel better going there and make it less clinical. they've asked me as I'm an older teenage art student (currently in Alevels) and would like me to design it to help it be teen-friendly.

What style it's done in is completely up to me and all they've given me to go on is that it needs to be something the teens (approx from 12/13 to 18/19 years old) can relate to and identify with, and preferably have to do with our view on mental health. I have ideas but would just like to survey what others think as I need advice to beta my opinions. please help me with this, I really hope to help the YESS successfully reach out to us kids as I've been there before and know the environment plays a big part in how comfortable people feel, I really want to get this right. please respond and thank you so much if you do or have even read this far :).