Final answer:
The correct safety principle for a pediatric unit is using bed rails for toddlers, as it helps prevent falls and ensures child safety in healthcare environments.
Step-by-step explanation:
The good safety principle to follow on a pediatric unit is c) Using bed rails for toddlers. It is essential to provide safe environments for children in healthcare settings to prevent injuries. Encouraging running in hallways and allowing unsupervised play with small toys can lead to accidents, while ignoring childproofing measures ignores the potential risks that the environment may pose to a child. On the other hand, using bed rails helps to prevent toddlers from falling out of their beds, which is a common and preventable form of injury in hospitals.
It is also consistent with good practice to ensure that play areas are safe and to prevent unsupervised access to potentially hazardous situations, such as play with small toys or near sources of water without proper supervision.