Final answer:
If pediatric pads are unavailable, use adult pads and continue chest compressions while waiting for advanced life support providers.
Step-by-step explanation:
If pediatric pads are unavailable, the best course of action is to use the adult pads on the 6-year-old child.
Although the child is younger than eight years old, using the adult pads can still deliver a shock that can potentially help in reviving the child's heartbeat. However, it is important to ensure that the pads are properly placed on the child's chest.
While waiting for advanced life support providers to arrive, it is crucial to continue performing chest compressions and following the AED prompts.