
Once upon a time, there was a little girl named Sally. Sally was three years old and loved to ride her tricycle. She would pedal around the neighborhood looking for fun things to do.
One day, Sally was trying very hard to grab a toy from a high shelf in the store. Suddenly, her tricycle started to slip away from her. She was so busy trying to get the toy that she didn't notice.
Just then, a voice spoke up. It was a policeman. He asked Sally why she was not watching her tricycle. The policeman said it was dangerous to not pay attention.
Sally felt very guilty. She asked the policeman if he would help her keep her tricycle in place. The policeman smiled and said "yes". He explained how to use the brakes to prevent the tricycle from rolling away.
Sally thanked the policeman and said she would never forget what he taught her. From that day on, Sally made sure that she always used the brakes to prevent her tricycle from slipping away.
