Final answer:
A child's PFD or lifejacket is never a boat, which is a vessel used to travel on water, not a flotation aid. Floatation aids like floaties or swim noodles do not replace the need for a proper lifejacket.
Step-by-step explanation:
A child's PFD (Personal Flotation Device) or lifejacket is never a boat. While a PFD is designed to provide buoyancy and keep a person afloat in water, ensuring safety, a boat is a vessel used to travel across water. It is crucial that children wearing lifejackets be supervised at all times to ensure water safety. Life preservers, floaties, and swim noodles are all various types of flotation aids, which may provide some level of buoyancy or support in the water, but should never be substituted for a properly fitting, coast-guard-approved lifejacket when it comes to ensuring a child's safety on the water.