Tradition and story time — not medical advice
Sir Buzz
Retold for young children from Tales of the Punjab: Folklore of India (collected by Flora Annie Steel, 1894), public domain.
A poor widow's son set off to seek his fortune with just a few coins in his pocket. On his way, he came across a tigress in pain, a sharp thorn stuck deep in her paw. Though frightened, he carefully pulled it out for her, and the grateful tigress gave him a small box as thanks, telling him not to open it until he had walked nine miles.
The box grew heavier and heavier as he walked, until, unable to carry it any farther, he set it down early and opened it — out popped a tiny, one-span-tall mannikin with a long trailing beard, who introduced himself grandly as "Sir Buzz!" and promised to serve the lad faithfully from then on.
Sir Buzz turned out to be wonderfully useful — whizzing off in a blink to fetch sweets, or flour, or anything else the lad needed, always returning with far more than his few coins should have bought. With Sir Buzz's help, the once-poor lad's fortunes began to turn around completely.
In time, with Sir Buzz's clever and energetic help, the lad was even able to win the hand of a princess, and he and his mother never wanted for anything again — all because he had once stopped to help a tigress in pain, even though it frightened him to do it.
Talk about it (ours, not from the source): the lad helped the tigress even though he was scared. What's a time being brave for someone else led to something good?
Source: Tales of the Punjab: Folklore of India, collected by Flora Annie Steel (1894, Macmillan and Co.) — "Sir Buzz". Public domain. Read the original.
Why public domain: US: first published 1894, more than 95 years ago, so public domain in the US. Collector Flora Annie Steel died 1929; public domain in India (life + 60 years) since 1989.