diff --git a/crates/storybook/src/gpui3/app.rs b/crates/storybook/src/gpui3/app.rs
index 9ab1e99a139800a0d5e3bc4e556c2aa5ff5d2d47..8d501341d018b58ad87e0788587c690f188a3592 100644
--- a/crates/storybook/src/gpui3/app.rs
+++ b/crates/storybook/src/gpui3/app.rs
@@ -23,15 +23,18 @@ impl AppContext {
         }
     }
 
-    pub fn open_window<S>(
+    pub fn open_window<S: 'static>(
         &mut self,
         build_root_view: impl FnOnce(&mut WindowContext) -> View<S>,
     ) -> WindowHandle<S> {
-        // let window = self.windows.insert_with_key(|id| {
+        let id = self.windows.insert(None);
 
-        // });
+        let mut window = Window::new(id);
+        let root_view = build_root_view(&mut WindowContext::mutable(self, &mut window));
+        window.root_view.replace(Box::new(root_view));
 
-        unimplemented!()
+        self.windows.get_mut(id).unwrap().replace(window);
+        WindowHandle::new(id)
     }
 
     pub(crate) fn update_window<R>(
diff --git a/crates/storybook/src/gpui3/window.rs b/crates/storybook/src/gpui3/window.rs
index 29677df58d6a1279c3cdc12891ed1d6018e70c15..feabe41aeb5b1b473b00fdec8104f18944dea90c 100644
--- a/crates/storybook/src/gpui3/window.rs
+++ b/crates/storybook/src/gpui3/window.rs
@@ -2,12 +2,15 @@ use super::{px, AppContext, Bounds, Context, EntityId, Handle, Pixels, Style, Ta
 use anyhow::Result;
 use derive_more::{Deref, DerefMut};
 use gpui2::Reference;
-use std::marker::PhantomData;
+use std::{any::Any, marker::PhantomData};
+
+pub struct AnyWindow {}
 
 pub struct Window {
     id: WindowId,
     rem_size: Pixels,
     layout_engine: Box<dyn LayoutEngine>,
+    pub(crate) root_view: Option<Box<dyn Any>>,
 }
 
 impl Window {
@@ -16,6 +19,7 @@ impl Window {
             id,
             layout_engine: Box::new(TaffyLayoutEngine::new()),
             rem_size: px(16.),
+            root_view: None,
         }
     }
 }
@@ -198,6 +202,15 @@ pub struct WindowHandle<S> {
     state_type: PhantomData<S>,
 }
 
+impl<S> WindowHandle<S> {
+    pub fn new(id: WindowId) -> Self {
+        WindowHandle {
+            id,
+            state_type: PhantomData,
+        }
+    }
+}
+
 #[derive(Clone)]
 pub struct Layout {
     pub order: u32,