Experiments
Visit the Journal of Chemical Education website https://pubs.acs.org/journal/jceda8 and browse by subject, then make a selection (e.g., school teachers or secondary education or teaching and learning methods) and then select from the list what you are interested in, and a large database of articles and experiments come up that you can read and learn more or conduct an experience (with the appropriate safe and healthy risk assessments provided).
Fieldtrips / Displays
Learn how chemiluminescent materials work in glowsticks
https://www.glowsticks.co.uk/how-do-glow-sticks-work.html
Watching fireflies at night – a form of bioluminescence
https://www.scientificamerican.com/article/how-and-why-do-fireflies/
Have a dermatologist visit and explain photodynamic therapy that helps with some skin conditions
https://www.cancer.gov/about-cancer/treatment/types/photodynamic-therapy