Once upon a time, there was a little boy named Tim. Tim loved to sort his toys. He had many toys, but his favorite toy was a small red car. One day, Tim was playing with his car near the stairs. He wanted to see if his car could go down the stairs. 
Tim put his car on the top stair and let it go. The car went down one stair, then two stairs, and then three stairs. But the car was too big to fit on the fourth stair. The car stopped and Tim was sad.
Tim's mom saw him and knew what to do. She found a smaller car that would fit on the stair. Tim tried the new car and it went down all the stairs. Tim was happy and clapped his hands. From that day on, Tim always played with the smaller car on the stairs.
