Once upon a time, there was a little boy named Tim. Tim had a big room with lots of toys. He liked to play with his toys every day. In his room, there was a shelf. The shelf was high up on the wall. On the shelf, there was a ball. One day, Tim wanted to play with the ball. He tried to get the ball from the shelf. But the shelf was too high for him. He tried to jump, but he could not reach it. He felt sad. Then, Tim had an idea. He got a chair and stood on it. He reached up and touched the ball. But the ball started to fall. Tim tried to catch it, but it fell too fast. The ball hit the floor hard. Tim was happy because he could play with the ball now. He picked up the ball and played with it all day.