Fireflies are cool! Did-- Did you know? Um! They glow 'cause of somethin' called biolumiosis!

[That's how you say that, right? Probably. Barry beams with pride at how smart he is. Not that he knows what bioluminescence is or how it works. That's not as important.]

Some kids think it's magic, but it's not. Some mushrooms have biolumiosis too!