I like to have a green, red or blue flame in my camp fire.
Wear some shades.
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copper sulfate will turn the flame a neat green color till it burns off
check it out: https://www.instructables.com/id/Colored_Flames/
Hit your local library for a book of "chemical magic tricks". The one I had as a kid had a number of different recommendations.
Personally, I like just tossing a sparkler into the campfire. if I'm in a place where I can purchase sparklers legally.