How does a hoverboard work?

A hover board is a board that has magnets on bottom. The reason that it has magnets is so it can propel itself upward with the magnetic pull in the ground. The way that they propel themselves upward is the same way two north magnets deflect from each other. The hover board has a special battery in it that picks up on the magnets in the ground like a metal detector picks up on metal. Doing this can let it defy gravity and propel the board and person upward.