Tradition and story time — not medical advice
The Bowl That Was Really Gold
Retold for young children from Jataka Tales (retold by Ellen C. Babbitt, 1912), public domain.
Two peddlers travelled from house to house in the same town, each calling out to trade small goods for whatever people no longer wanted. In one poor house lived a grandmother and her granddaughter, who owned nothing valuable except one old, blackened bowl.
The first peddler, a greedy man, looked closely at the bowl and realized with excitement that it was solid gold beneath the grime — but he wanted it for nothing. "This old thing?" he said, pretending to be unimpressed. "Not even worth a halfpenny." And he tossed it down and walked off, planning to come back later with a low offer once they'd given up hope of it being worth anything.
Soon after, the second peddler came by, and the girl asked him to look at the bowl too. He turned it over gently and realized at once what it truly was. "I couldn't possibly take this for a trade," he said honestly. "It's a bowl of gold — I don't have enough with me to pay what it's worth." He gave the grandmother every coin and every good he was carrying, and even that, he said, wasn't really enough.
When the first peddler returned, ready to make his cheap offer, he learned the bowl was already gone — sold honestly, for a fair and generous price, to the peddler who had told the truth.
Talk about it (ours, not from the source): one peddler pretended something valuable was worthless to trick someone. What does it mean to tell the truth even when a lie would help you?
Source: Jataka Tales, retold by Ellen C. Babbitt (1912, The Century Co.) — "The Merchant of Seri". Public domain. Read the original.
Why public domain: US: first published 1912, more than 95 years ago, so public domain in the US regardless of the author's death date (Project Gutenberg eBook #62514).