diff --git a/examples/dev_sandbox.py b/examples/dev_sandbox.py
deleted file mode 100644
index 60299cac8..000000000
--- a/examples/dev_sandbox.py
+++ /dev/null
@@ -1,66 +0,0 @@
-from rich.console import RenderableType
-from rich.panel import Panel
-
-from textual import events
-from textual.app import App
-from textual.renderables._tab_headers import Tab
-from textual.widget import Widget
-from textual.widgets.tabs import Tabs
-
-
-class PanelWidget(Widget):
-    def render(self) -> RenderableType:
-        return Panel("hello world!", title="Title")
-
-
-class BasicApp(App):
-    """Sandbox application used for testing/development by Textual developers"""
-
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        self.tabs = Tabs(
-            [
-                Tab("One", name="one"),
-                Tab("Two", name="two"),
-                Tab("Three", name="three"),
-                Tab("Four", name="four"),
-                Tab("Five", name="five"),
-                Tab("Six", name="six"),
-                Tab("SixHundred", name="seven"),
-                Tab("Eight", name="eight"),
-            ],
-            active_tab="three",
-            tab_padding=1,
-        )
-        self.tab_keys = {
-            "1": "one",
-            "2": "two",
-            "3": "three",
-            "4": "four",
-            "5": "five",
-            "6": "six",
-            "7": "seven",
-            "8": "eight",
-        }
-
-    def on_load(self):
-        """Bind keys here."""
-        self.bind("tab", "toggle_class('#sidebar', '-active')")
-        self.bind("a", "toggle_class('#header', '-visible')")
-        self.bind("c", "toggle_class('#content', '-content-visible')")
-        self.bind("d", "toggle_class('#footer', 'dim')")
-
-    def on_key(self, event: events.Key) -> None:
-        self.tabs._active_tab_name = self.tab_keys.get(event.key, "one")
-
-    def on_mount(self):
-        """Build layout here."""
-        self.mount(
-            header=self.tabs,
-            content=PanelWidget(),
-            footer=Widget(),
-            sidebar=Widget(),
-        )
-
-
-BasicApp.run(css_file="dev_sandbox.scss", watch_css=True, log="textual.log")
diff --git a/examples/dev_sandbox.scss b/examples/dev_sandbox.scss
deleted file mode 100644
index f49ece1a6..000000000
--- a/examples/dev_sandbox.scss
+++ /dev/null
@@ -1,60 +0,0 @@
-/* CSS file for dev_sandbox.py */
-
-$text: #f0f0f0;
-$primary: #262626;
-$secondary:#95d52a;
-$background: #262626;
-
-$primary-style: $text on $background;
-$animation-speed: 500ms;
-$animation: offset $animation-speed in_out_cubic;
-
-App > View {
-  docks: side=left/1;
-  text: on $background;
-}
-
-Widget:hover {
-  outline: heavy;
-  text: bold !important;
-}
-
-#sidebar {
-  text: $primary-style;
-  dock: side;
-  width: 24;
-  offset-x: -100%;
-  transition: $animation;
-  border-right: outer $secondary;
-}
-
-#sidebar.-active {
-  offset-x: 0;
-}
-
-#header {
-  text: $text on $primary;
-  height: 2;
-}
-
-#header.-visible {
-  visibility: hidden;
-}
-
-#content {
-  text: $text on $background;
-}
-
-#content.-content-visible {
-  visibility: hidden;
-}
-
-#footer {
-  opacity: 1;
-  text: $text on $primary;
-  border-top: hkey $secondary;
-}
-
-#footer.dim {
-  opacity: 0.5;
-}