Well, for younger kids, a children's short story might be around 500 - 1000 words. For older kids, it could go up to 1500 - 2000 words. The key is to keep it engaging and not too long or too short for the intended audience.
Children's short stories typically have between 800 and 1500 words. This allows for a clear plot, interesting characters, and enough detail to hold a child's attention without overwhelming them. However, there are no strict rules, and it really depends on the story's content and the age of the readers.