I'm trying to identify a short story where humans and an alien race are trying to negotiate to end a war, but the negotiations are failing.
Aspects of the story that I can remember:
- An Earth child and alien child meet and play together
- An alien child falls into a fountain and the Earth child thinks he will drown
- An alien child can close his nose to keep water out
In the end,
children discover what adults could not and save the negotiations. I think they needed "shreepril" which turned out to be salt, I believe.