Hello Sneha,
The topic :- Gift of Imagination is a very beautiful topic that has a lot of things unexplored. If you want a story on it you can go ahead and do your research about the topic and get it done. Because I feel that the work we do ourselves gives us the maximum happiness and pride. But for key points, you can :-
1. Start off by elaboration the concept of Imagination
2. Then if its a narrative then you could bring up characters of your story give them a small back story as well and then take the story in which ever way you feel is appropriate.
3. If its not a narrative and its an essay kind of thing you can write a paragraph about the concept of mind, its way of functioning and also give a small example of someone who imagined (dreamt) and succeeded.
I hope it helped.
All the best.
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