Once in a magical forest, there lived a beautiful unicorn named Sparkle. Sparkle had a shimmering white coat and a horn that sparkled in the sunlight. One day, Sparkle noticed that the rainbow that usually arched across the sky was missing. Concerned, Sparkle set out on a journey to find the lost rainbow.

As Sparkle trotted through the forest, she asked the animals if they had seen the rainbow. The birds chirped and the squirrels chattered, but no one had seen the rainbow. Sparkle continued on her journey, determined to bring back the colors to the sky. Suddenly, she heard a faint cry for help coming from a nearby cave.

Curious, Sparkle approached the cave and found a little fairy trapped inside. The fairy explained that she had accidentally trapped the rainbow inside a crystal and couldn't set it free. Sparkle knew she had to help the fairy and the rainbow. With a gentle touch of her horn, Sparkle broke the crystal and released the rainbow.

As the rainbow soared back into the sky, the colors danced and shimmered once again. The fairy thanked Sparkle for her kindness and granted her a special gift - the ability to make wishes come true. Sparkle was overjoyed and knew that she would always use her gift to bring happiness to others. And from that day on, the magical unicorn and the rainbow were forever intertwined in the hearts of all who believed in their magic.