The Magnet Gloves from The Legend of Zelda series only appear in two of the series' games. This item works by either attracting your character to, or repelling the character away from, certain objects stuck into the ground. The interesting thing about this is that the item can "switch polarity" by the press of a button. Theoretically, this could be possible using electromagnets. If the current were able to switch directions, then the magnet should switch its polarities. Although, don't ask me why a game set in a magical medieval style is using electromagnets.