Practicing creative writing brings us, and especially the children, a lot of benefits in developing not only writing skills, but also other skills such as: 

Build vocabulary, writing skill, and develop grammar skill: By brainstorming what to write, we are stimulating our minds to choose and find the right words that best describe our ideas, to play in the sentences, in the story in the most efficient way possible. And by trying to find the closest way to tell the audience our ideas, we can improve our use of grammar as well.

Develop emotional skills: Coming up with a story is not just about building the plot and the characters, it also involves giving the characters their souls, emotions, characteristics. It’s about creating the emotional development that the characters should have in a specific situation and to make them give out the reaction/action in accordance with their own mind.

Develop intellectual skill and improve organization skill : Creative writing helps us with our writing skills, communication skills, problem solving skills, and logical thinking skills. By writing down and building up a story, or an idea in the most understandable and logical way following what is in our mind, we are allowing ourselves to live another life of the character with as many faults and flaws as possible. And we enable ourselves to get experience by receiving feedback from others to do self adjustment, to fix and hone our above skills on paper before actually making mistakes in real life.