Maen everyone!
Great about the vaccine!
Dry ice is so fun! When we played tabletop RPG with friends at home, sometimes we ordered ice cream. And some of the providers included small pieces of dry ice to keep the ice cream cold while delivered, so of course we added them to glasses of water and we have our potions! Very fitting for D&D settings.
Also at the university we sometimes received reagents in boxes with dry ice and we loved to drop them on the sink add some water and look at the effect.
Still, the coolest use of dry ice is making a cloud chamber