Considering that two of the same magnetic pole (south-south/north-north) will repel each other, as opposite magnetic poles will attract, it is possible to create a building that floats and bounces on large magnets. There is a magnet underneath it and the same type of magnet attached to the bottom of the building facing each other. You will need a surrounding around the building, so that it doesn't bounce out of place and crash down when it weighs to one side. This creation requires very large and very strong magnets. These magnets are two of the same kind, as I said, so that there needs to be a north or south magnet on the ground and either north or south on the bottom of the building as well, depending on what is in the ground.