What should you do to ensure children's safety when there may be kids playing behind parked cars?

To ensure children's safety when there may be kids playing behind parked cars, it is essential to always walk around your car. This practice allows you to have a clear view of the area and specifically check for any children who might be out of sight. Walking around the car helps to eliminate blind spots that mirrors cannot cover, especially in situations where small children might be playing.

While the other options suggest some precautions, they don't provide the same comprehensive safety measure. For instance, beginning to drive slowly may reduce overall speed, but it does not guarantee the visibility of children who might be moving unexpectedly. Honking your horn might alert some children, but it is not a reliable method since not all children may hear or heed the sound. Relying solely on mirrors can be particularly unsafe, as they might not show everything directly behind or around the vehicle. Thus, walking around your car before getting in is the most effective approach to ensure that the area is clear and safe for everyone, especially children.