If normal switch plate covers are too mundane for you, try these Toggle Switch Plates from UncommonGoods for a little Rube Goldberg steampunk style. They are designed by father and son Lance and L J Nybye. The plates are made with brass hardware and laser-engraved plywood. You can attach them over your existing standard switch plates with the screws you already have. The Toggle Switch Plates are available in two single-switch styles ($40 each) and one double-switch design ($50) from UncommonGoods.