Define all you want; but the PRACTICE on the ground is much different.
Agreed, up to a point, and children will not much distinguish between a little mermaid, (under the sea, Darling it's better, Down where it's wetter, Take it from me), a cartoon dinosaur roaming the land with Alley Oop (Alley Oop, oop, oop-oop, Ride, Daddy, ride Hi-yo dinosawruh), Noah in his Ark (When Noah had drifted on the flood many days, He searched for land (He searched for land), In various ways (various ways), Troubles, he had some...) or Easter bunnies.
All are part of a magical realm a young child will only slowly learn to distinguish from the alleged "real world".
But they will eventually ask, and then teachers should be ready with appropriate definitions.
Among them, a child can be told that science does not "disprove" religion, it merely assumes no supernatural explanations can be admitted as scientific.
Why, you ask?
Well, child, it's because our science can't study God, don't you see, only what He made?