Replace the example

With something trivial but functional

notebooks/example.ipynb

@@ -5,23 +5,45 @@
    "id": "c44a93e4-1ce4-4a26-a82a-3d2bff41988b",
    "metadata": {},
    "source": [
-    "# Demo notebook\n",
-    "\n",
-    "In the standard setup, this notebook gets included in both the docs and the tests.\n",
+    "# Demos"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "51352718-c84e-4515-b033-f0cd80150269",
+   "metadata": {},
+   "source": [
+    "## `DotDict`"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "0cef82c5-686f-4753-b8aa-ee8125f17380",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "this is dot accessible\n"
+     ]
+    }
+   ],
+   "source": [
+    "from pyiron_snippets.dotdict import DotDict\n",
     "\n",
-    "In the notebook gallery in the docs, most notebooks will use their last image as their thumbnail; this notebook specifies usage of the pyiron logo in `docs/conf.py` under the `nbsphinx_thumbnails` dictionary."
+    "dd = DotDict({\"foo\": \"this is dot accessible\"})\n",
+    "print(dd.foo)"
    ]
   },
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "52a8cfcc",
+   "id": "203b5240-0ce9-4c71-86a0-6048b45f7b0f",
    "metadata": {},
    "outputs": [],
-   "source": [
-    "import pyiron_snippets\n",
-    "print(pyiron_snippets.__version__)"
-   ]
+   "source": []
   }
  ],
  "metadata": {
@@ -40,7 +62,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.11.7"
+   "version": "3.11.9"
   }
  },
  "nbformat": 4,