以下是一個簡單的英文短篇兒童故事，講述了一隻小老鼠和一隻小貓的友誼：
One day, a little mouse ran into a cat's house. The cat was fast asleep and didn't notice the mouse at first. But the mouse was very scared and couldn't find a way out.
Then, the cat woke up and saw the mouse. The mouse was so scared that it couldn't run away. But then, the cat said, "Don't be afraid, little mouse. I won't harm you."
From then on, the cat and the mouse became good friends. They played together and shared their food and toys. The mouse even taught the cat some new tricks and they had a lot of fun.
One day, the mouse fell into a trap and couldn't get out. The cat came to help it and saved the mouse. After that, they always looked out for each other and protected each other.
這個故事告訴我們，即使是小動物也可以建立深厚的友誼，我們應該尊重和愛護每一個生命。
希望這個故事能夠給孩子們帶來快樂和啟示。