We are quite embarrassed about this. I think we have learned a lesson. I hope that by tomorrow all symptoms are gone and there is no permanent damage. Maybe you should do a article on dangers of ingesting plant liquids, but perhaps we're the only ones in the world who would pull such a stunt. I look forward to hearing from you.
Elephant ears contain minute, sharp crystal bundles of calcium oxalate.
This causes intense burning and swelling of the mouth and throat. Symptoms may include intense salivation, hoarseness, and difficulty in swallowing. They can also cause skin irritation and eye irritation if the juice gets in your eye. While not deadly, heavy infestations can cause intense swelling which can restrict breathing. As I am sure, you won't be eating them again, if anyone else should, give milk or ice cream to sooth the mouth and throat, or suck on ice chips to get some relief.