diff --git a/examples/Interactive Widgets/Widget Styling.ipynb b/examples/Interactive Widgets/Widget Styling.ipynb
index 14424cb..5dac916 100644
--- a/examples/Interactive Widgets/Widget Styling.ipynb
+++ b/examples/Interactive Widgets/Widget Styling.ipynb
@@ -17,7 +17,7 @@
    "name": "python2"
   },
   "name": "",
-  "signature": "sha256:aead3efdf2770e2764fcf617c9e9ba6d40343cf25b01642fbd2a3e66de2b0d7c"
+  "signature": "sha256:f6e8d46c3edeaf2371bf508730c093f8d1005cc9be13072aabf71dc3f49b2c3b"
  },
  "nbformat": 3,
  "nbformat_minor": 0,
@@ -634,131 +634,6 @@
       }
      },
      "source": [
-      "Style classes"
-     ]
-    },
-    {
-     "cell_type": "markdown",
-     "metadata": {},
-     "source": [
-      "In addition to alignment classes, the classes defined by Bootstrap can also be used.  This tutorial will only cover a few of the most common classes.  For a full list of Bootstrap classes, please refer to [Bootstrap's website](http://getbootstrap.com/2.3.2/)."
-     ]
-    },
-    {
-     "cell_type": "heading",
-     "level": 3,
-     "metadata": {},
-     "source": [
-      "ButtonWidgets"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "# List of the bootstrap button styles\n",
-      "classes = [\n",
-      "    'btn', \n",
-      "    'btn-primary', \n",
-      "    'btn-info', \n",
-      "    'btn-success', \n",
-      "    'btn-warning', \n",
-      "    'btn-danger', \n",
-      "    'btn-inverse', \n",
-      "    'btn-link'\n",
-      "]\n",
-      "\n",
-      "# Display the buttons in a hbox\n",
-      "container = widgets.HBox(children=[widgets.Button(description=c) for c in classes])\n",
-      "display(container)\n",
-      "\n",
-      "# Apply classes after display\n",
-      "ret = [container.children[i].add_class(c) for i, c in enumerate(classes)]"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": []
-    },
-    {
-     "cell_type": "heading",
-     "level": 3,
-     "metadata": {
-      "slideshow": {
-       "slide_type": "slide"
-      }
-     },
-     "source": [
-      "ContainerWidgets"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "def create_label(cls):\n",
-      "    class_name = widgets.HTML(value=cls)\n",
-      "    container = widgets.Box(children=[class_name])\n",
-      "    display(container)\n",
-      "    container.add_class(cls)\n",
-      "\n",
-      "ret = [create_label(c) for c in [\n",
-      "    'alert', \n",
-      "    'alert alert-error', \n",
-      "    'alert alert-success', \n",
-      "    'alert alert-info'\n",
-      "]]"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": []
-    },
-    {
-     "cell_type": "heading",
-     "level": 3,
-     "metadata": {
-      "slideshow": {
-       "slide_type": "slide"
-      }
-     },
-     "source": [
-      "ProgressWidgets"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "classes = [\n",
-      "    'progress-info', \n",
-      "    'progress-success', \n",
-      "    'progress-warning', \n",
-      "    'progress-danger',\n",
-      "    'progress-info progress-striped', \n",
-      "    'progress-success progress-striped', \n",
-      "    'progress-warning progress-striped', \n",
-      "    'progress-danger progress-striped',\n",
-      "    'active progress-info progress-striped', \n",
-      "    'active progress-success progress-striped', \n",
-      "    'active progress-warning progress-striped', \n",
-      "    'active progress-danger progress-striped',\n",
-      "]\n",
-      "ws = [widgets.IntProgress(value=50, description=c) for c in classes]\n",
-      "ret = [display(w) for w in ws]\n",
-      "ret = [ws[i].add_class(c) for i, cs in enumerate(classes) for c in cs.split(' ')]"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": []
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {
-      "slideshow": {
-       "slide_type": "slide"
-      }
-     },
-     "source": [
       "Visibility"
      ]
     },