How would a 12year old or even high school kids even know what a bad trip is...or to get good acid?

I've done Salvia before and I can tell you, it is nothing of an acid trip, a good one, bad one. Salvia is so fuckin harmless it's not even funny. It sends a person into a laughing fit and they can't shut up for maybe 20min. It doesn't even feel like shrooms, or mild shrooms, its in a different league of its own.