I just think the novelty of these type of displays was up in the 90s, It’s time for an upgrayedd. I propose leprechauns flying up and down the river wearing water jet packs, shooting people with their Chicago-style hot dog cannons would be more with the times. What’s your idea?
Pretty sure you can eat Fluorescein with no ill effects other than turning your piss dayglo. It’s very widely used as a ‘non-toxic’ tracer dye so I’d imagine studies have been done.