Children love imagination, and linking things that appear to be connected.
If you like mountain walking, 6 miles is a long way, but in a car at 60 mph it is 6 minutes. It is this scale that fanatasy books use, to help us explore, question and dream.
And without dreamers we get no technology or discoveries or advances. So many scientists died before there dreams became true, or discoveries they made were used in a big way. This is why I laugh at materialists and determinists, because they have no clue how the world around them came into being, through the creative imagination of fellow human beings, and because of Gods creative power and love.