In the heart of the forest lived a tiny mouse named Mimi. Mimi was not like any other mouse. She believed she was an elephant.

Mimi dreamed of moving mountains, just like an elephant. She spent her days pushing against the huge mountain near her burrow, trying to move it.

The other animals watched Mimi's efforts, laughing at her determination. They couldn't understand why a little mouse would ever think she was an elephant.

"Why do you try so hard, Mimi? You're a mouse, not an elephant!" they would say. But Mimi just smiled, her faith unwavering.

Even when the forest was asleep, Mimi continued to push against the mountain. She believed that one day, she would move it.

Days turned into weeks, and weeks into months. Although the mountain didn't move, Mimi didn't give up. She was determined to prove herself.

One day, an old tortoise approached Mimi. He had been observing her efforts for a while and decided to share some wisdom.

"Mimi," he said, "it's not the size that matters, but the will. You may not move mountains, but you can climb them."

Mimi looked at the mountain in a new light. She realized she had been trying to do the impossible, but now she had a new goal.

Mimi started climbing the mountain. It was a difficult task, but she was determined. She pushed herself, inching her way up, one step at a time.

After days of relentless efforts, Mimi reached the peak. She had done it. She had climbed the mountain that she once wanted to move.

Mimi might have been a mouse, but she had the heart of an elephant. She proved that with determination and will, one can achieve anything.