Edit in JSFiddle

// build the desk /
// ------------------------------

// Desk - top
.add(TweenMax.to($(".bench"), 2, {
    css: {
      transform: "scaleX(1)"
    },
    ease: Back.easeOut
  }), 0) // add desk top

// Desk - legs
.add(TweenMax.staggerFromTo($(".leg"), 2, {
    "transform": "scaleY(0)"
  }, {
    "transform": "scaleY(1)",
    ease: Power4.easeInOut
  }, 0.1), 0) // Extend desk legs