Once upon a time, there was a white cat. Its goal was to find the biggest mouse in the world. The cat was determined to find the biggest mouse and so it went out looking. Everywhere it went, it asked people if they had seen the mouse. One day, the cat came across a mouse that was tiny. It guessed that it wasn't the biggest mouse and sighed. The mouse spotted the cat and ran away. The cat was disappointed and angry. "I'll never find the biggest mouse," it thought sadly. Just then, another mouse appeared. The cat guessed it was bigger than the last mouse it had seen. Excited, the cat leapt forward, ready to grab the mouse. But the mouse was too fast. It ran away, leaving the cat behind. The cat sighed again. "Maybe I can find the biggest mouse another day," it thought. And so it kept searching.