The Jain story of King Shrenik and Kalsaurik the butcher teaches that true ahimsa begins in the mind and heart, not only by outer force. In the story, Kalsaurik was a butcher in King Shrenik’s kingdom and was deeply habituated to slaughtering animals. Bhagwan Mahavir explained to Shrenik that if the butcher was not inwardly transformed, simply imprisoning him would not remove the violence. Shrenik tried to stop him, but even in confinement Kalsaurik continued imagining animals and “killing” them mentally, showing how strong violent habit can be. The lesson is that non-violence must be practiced through inner restraint, compassion, and transformation of consciousness. ( jainknowledge.com)

A simple moral from this story is:

• Habit becomes bondage
• Outer control is not enough
• Heart purification is essential for ahimsa ( jainknowledge.com)

If you want, I can also give this story in simple Hindi or as a short moral tale for children.