/**
 * Makes our wp_nav_menu() fallback -- wp_page_menu() -- show a home link named "Bacon".
 */
function twentytwelve_child_theme_page_menu_args( $args ) {
    if ( ! isset( $args['show_home'] ) )
        $args['show_home'] = "Bacon";
    return $args;
}
add_filter( 'wp_page_menu_args', 'twentytwelve_child_theme_page_menu_args' );