"Something with magnets. I'm not an engineer. There is metal under the sand, it pushes on the metal to fly, but it can only go so high and only where the metal is."

Hovercraft thing tilts backwards as it comes close, slowing down. When it lands, a much bigger Hiver leaps out of a window, lands deftly, and asks, "Greetings, worker. Little one, you are the visitor?"