diff --git a/0_tf_hello_world.ipynb b/0_tf_hello_world.ipynb
index 96cf255..78b6272 100644
--- a/0_tf_hello_world.ipynb
+++ b/0_tf_hello_world.ipynb
@@ -16,18 +16,30 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 5,
    "metadata": {
-    "collapsed": false
+    "collapsed": false,
+    "scrolled": true
    },
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "b'Hello World!'\n"
+     ]
+    }
+   ],
    "source": [
     "import tensorflow as tf\n",
-    "import matplotlib\n",
     "\n",
-    "hello = tf.constant('Hello, TensorFlow!')\n",
-    "sess = tf.Session()\n",
-    "print(sess.run(hello))"
+    "# Create TensorFlow object called hello_constant\n",
+    "hello_constant = tf.constant('Hello World!')\n",
+    "\n",
+    "with tf.Session() as sess:\n",
+    "    # Run the tf.constant operation in the session\n",
+    "    output = sess.run(hello_constant)\n",
+    "    print(output) # b'Hello World!' showul appear in output cell just below this line"
    ]
   },
   {
@@ -46,22 +58,23 @@
   }
  ],
  "metadata": {
+  "anaconda-cloud": {},
   "kernelspec": {
-   "display_name": "Python 2",
+   "display_name": "Python [conda env:IntroToTensorFlow]",
    "language": "python",
-   "name": "python2"
+   "name": "conda-env-IntroToTensorFlow-py"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
+   "pygments_lexer": "ipython3",
+   "version": "3.5.2"
   }
  },
  "nbformat": 4,
diff --git a/1_linear_regression_model.ipynb b/1_linear_regression_model.ipynb
index b3c8de5..1db3be1 100644
--- a/1_linear_regression_model.ipynb
+++ b/1_linear_regression_model.ipynb
@@ -155,21 +155,21 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 2",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "python2"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
+   "pygments_lexer": "ipython3",
+   "version": "3.5.2"
   }
  },
  "nbformat": 4,
diff --git a/2_mnist.ipynb b/2_mnist.ipynb
index f290b7b..4f9ed57 100644
--- a/2_mnist.ipynb
+++ b/2_mnist.ipynb
@@ -282,21 +282,21 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 2",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "python2"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
+   "pygments_lexer": "ipython3",
+   "version": "3.5.2"
   }
  },
  "nbformat": 4,