diff --git a/demo_markdown/docs/menu/mod.md b/demo_markdown/docs/menu/mod.md
index b8e2768..19d107d 100644
--- a/demo_markdown/docs/menu/mod.md
+++ b/demo_markdown/docs/menu/mod.md
@@ -4,11 +4,19 @@
 let value = create_rw_signal(String::from("o"));
 
 view! {
-    <Menu value>
+    <Menu value default_expanded_keys=vec![String::from("area")]>
         <MenuItem key="a" label="And"/>
         <MenuItem key="o" label="Or"/>
-        <MenuItem icon=icondata::AiAreaChartOutlined key="area" label="Area Chart"/>
-        <MenuItem icon=icondata::AiPieChartOutlined key="pie" label="Pie Chart"/>
+        <MenuItem icon=icondata::AiAreaChartOutlined key="area" label="Area Chart">
+            <MenuItem key="target" label="Target"/>
+            <MenuItem key="above" label="Above"/>
+            <MenuItem key="below" label="Below"/>
+        </MenuItem>
+        <MenuItem icon=icondata::AiPieChartOutlined key="pie" label="Pie Chart">
+            <MenuItem key="pie-target" label="Target"/>
+            <MenuItem key="pie-above" label="Above"/>
+            <MenuItem key="pie-below" label="Below"/>
+        </MenuItem>
         <MenuItem icon=icondata::AiGithubOutlined key="github" label="Github"/>
         <MenuItem icon=icondata::AiChromeOutlined key="chrome" label="Chrome"/>
     </Menu>
@@ -17,11 +25,12 @@ view! {
 
 ### Menu Props
 
-| Name     | Type                                | Default              | Description                             |
-| -------- | ----------------------------------- | -------------------- | --------------------------------------- |
-| class    | `OptionalProp<MaybeSignal<String>>` | `Default::default()` | Addtional classes for the menu element. |
-| value    | `Model<String>`                     | `Default::default()` | The selected item key of the menu.      |
-| children | `Children`                          |                      | Menu's content.                         |
+| Name | Type | Default | Description |
+| --- | --- | --- | --- |
+| class | `OptionalProp<MaybeSignal<String>>` | `Default::default()` | Addtional classes for the menu element. |
+| value | `Model<String>` | `Default::default()` | The selected item key of the menu. |
+| default_expanded_keys | `Vec<String>` | `Default::default()` | The default expanded submenu keys. |
+| children | `Children` |  | Menu's content. |
 
 ### MenuGroup Props
 
@@ -39,3 +48,4 @@ view! {
 | label | `MaybeSignal<String>` | `Default::default()` | The label of the menu item. |
 | key | `MaybeSignal<String>` | `Default::default()` | The indentifier of the menu item. |
 | icon | `OptionalMaybeSignal<icondata_core::Icon>` | `None` | The icon of the menu item. |
+| children | `Option<Children>` | `None` | MenuItem's content. |
diff --git a/thaw/src/menu/menu-item.css b/thaw/src/menu/menu-item.css
index 29b9e72..97bca84 100644
--- a/thaw/src/menu/menu-item.css
+++ b/thaw/src/menu/menu-item.css
@@ -1,7 +1,11 @@
+.thaw-menu {
+    padding-bottom: 0.3rem;
+}
+
 .thaw-menu-item__content {
     display: flex;
     align-items: center;
-    margin: 0.3rem 0.4rem;
+    margin: 0.3rem 0.4rem 0;
     padding: 0.5rem 0.75rem;
     color: var(--thaw-font-color);
     cursor: pointer;
@@ -22,3 +26,45 @@
     color: var(--thaw-font-color-active);
     background-color: var(--thaw-background-color);
 }
+
+.thaw-menu-item__content--submenu-selected {
+    color: var(--thaw-font-color-active);
+}
+
+.thaw-menu-item__arrow {
+    font-size: 18px;
+    margin-inline-start: auto;
+    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
+    transform: rotate(0deg);
+}
+
+.thaw-menu-item__arrow--open {
+    transform: rotate(90deg);
+}
+
+.thaw-menu-submenu {
+    margin-left: 1.6rem;
+}
+
+.thaw-menu-submenu.fade-in-height-expand-transition-leave-from,
+.thaw-menu-submenu.fade-in-height-expand-transition-enter-to {
+    opacity: 1;
+}
+
+.thaw-menu-submenu.fade-in-height-expand-transition-leave-to,
+.thaw-menu-submenu.fade-in-height-expand-transition-enter-from {
+    opacity: 0;
+    max-height: 0;
+}
+
+.thaw-menu-submenu.fade-in-height-expand-transition-leave-active {
+    overflow: hidden;
+    transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1) 0s,
+        opacity 0.2s cubic-bezier(0, 0, 0.2, 1) 0s;
+}
+
+.thaw-menu-submenu.fade-in-height-expand-transition-enter-active {
+    overflow: hidden;
+    transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1),
+        opacity 0.2s cubic-bezier(0.4, 0, 1, 1);
+}
diff --git a/thaw/src/menu/menu_item.rs b/thaw/src/menu/menu_item.rs
index 168a8ca..0b723c8 100644
--- a/thaw/src/menu/menu_item.rs
+++ b/thaw/src/menu/menu_item.rs
@@ -1,8 +1,8 @@
-use super::use_menu;
+use super::MenuInjection;
 use crate::{theme::use_theme, Icon, Theme};
 use leptos::*;
-use thaw_components::OptionComp;
-use thaw_utils::{class_list, mount_style, OptionalMaybeSignal, OptionalProp};
+use thaw_components::{CSSTransition, OptionComp};
+use thaw_utils::{class_list, mount_style, OptionalMaybeSignal, OptionalProp, StoredMaybeSignal};
 
 #[component]
 pub fn MenuItem(
@@ -10,15 +10,47 @@ pub fn MenuItem(
     #[prop(optional, into)] icon: OptionalMaybeSignal<icondata_core::Icon>,
     #[prop(into)] label: MaybeSignal<String>,
     #[prop(optional, into)] class: OptionalProp<MaybeSignal<String>>,
+    #[prop(optional)] children: Option<Children>,
 ) -> impl IntoView {
     mount_style("menu-item", include_str!("./menu-item.css"));
     let theme = use_theme(Theme::light);
-    let menu = use_menu();
-    let click_key = key.clone();
+
+    let submenu_ref = NodeRef::<html::Div>::new();
+    let is_children = children.is_some();
+    let menu = MenuInjection::use_();
+    let parent_menu_item = StoredValue::new(MenuItemInjection::use_());
+
+    let is_open_children = RwSignal::new({
+        key.with_untracked(|key| {
+            menu.default_expanded_keys
+                .with_value(|default_expanded_keys| default_expanded_keys.contains(key))
+        })
+    });
+    let key: StoredMaybeSignal<_> = key.into();
+    let is_selected = Memo::new(move |_| menu.value.with(|value| key.with(|key| value == key)));
+    let is_submenu_selected =
+        Memo::new(move |_| menu.path.with(|path| key.with(|key| path.contains(key))));
+
     let on_click = move |_| {
-        let click_key = click_key.get();
-        if menu.0.with(|key| key != &click_key) {
-            menu.0.set(click_key);
+        if is_children {
+            is_open_children.set(!is_open_children.get_untracked());
+        } else {
+            if !is_selected.get_untracked() {
+                menu.path.update(|path| {
+                    path.clear();
+                });
+                parent_menu_item.with_value(|parent_menu_item| {
+                    if let Some(parent_menu_item) = parent_menu_item {
+                        let mut item_path = vec![];
+                        parent_menu_item.get_path(&mut item_path);
+                        menu.path.update(|path| {
+                            path.extend(item_path);
+                        });
+                    }
+                });
+
+                menu.value.set(key.get_untracked());
+            }
         }
     };
 
@@ -41,8 +73,10 @@ pub fn MenuItem(
         <div class="thaw-menu-item">
             <div
                 class=class_list![
-                    "thaw-menu-item__content", ("thaw-menu-item__content--selected", move || menu.0
-                    .get() == key.get()), class.map(| c | move || c.get())
+                    "thaw-menu-item__content",
+                    ("thaw-menu-item__content--selected", move || is_selected.get()),
+                    ("thaw-menu-item__content--submenu-selected", move || is_submenu_selected.get()),
+                    class.map(| c | move || c.get())
                 ]
 
                 on:click=on_click
@@ -58,7 +92,68 @@ pub fn MenuItem(
                     }
                 }
                 {move || label.get()}
+                {
+                    if children.is_some() {
+                        view! {
+                            <Icon
+                                icon=icondata_ai::AiRightOutlined
+                                class=Signal::derive(move || {
+                                    let mut class = String::from("thaw-menu-item__arrow");
+                                    if is_open_children.get() {
+                                        class.push_str(" thaw-menu-item__arrow--open");
+                                    }
+                                    class
+                                })/>
+                        }.into()
+                    } else {
+                        None
+                    }
+                }
             </div>
+
+            <OptionComp value=children let:children>
+                <Provider value=MenuItemInjection { key, parent_menu_item }>
+                    <CSSTransition
+                        node_ref=submenu_ref
+                        name="fade-in-height-expand-transition"
+                        appear=is_open_children.get_untracked()
+                        show=is_open_children
+                        let:display
+                    >
+                        <div
+                            class="thaw-menu-submenu"
+                            style=move || display.get()
+                            ref=submenu_ref
+                            role="menu"
+                            aria-expanded=move || if is_open_children.get() { "true" } else { "false" }
+                        >
+                            {children()}
+                        </div>
+                    </CSSTransition>
+                </Provider>
+            </OptionComp>
         </div>
     }
 }
+
+#[derive(Clone)]
+struct MenuItemInjection {
+    pub key: StoredMaybeSignal<String>,
+    pub parent_menu_item: StoredValue<Option<MenuItemInjection>>,
+}
+
+impl MenuItemInjection {
+    fn use_() -> Option<Self> {
+        use_context()
+    }
+
+    fn get_path(&self, path: &mut Vec<String>) {
+        self.parent_menu_item.with_value(|parent_menu_item| {
+            if let Some(parent_menu_item) = parent_menu_item.as_ref() {
+                parent_menu_item.get_path(path);
+            }
+        });
+
+        path.push(self.key.get_untracked());
+    }
+}
diff --git a/thaw/src/menu/mod.rs b/thaw/src/menu/mod.rs
index 08598dc..f8925ee 100644
--- a/thaw/src/menu/mod.rs
+++ b/thaw/src/menu/mod.rs
@@ -7,24 +7,34 @@ pub use menu_item::*;
 pub use theme::MenuTheme;
 
 use leptos::*;
+use std::collections::BTreeSet;
 use thaw_utils::{class_list, Model, OptionalProp};
 
 #[component]
 pub fn Menu(
     #[prop(optional, into)] value: Model<String>,
     #[prop(optional, into)] class: OptionalProp<MaybeSignal<String>>,
+    #[prop(optional)] default_expanded_keys: Vec<String>,
     children: Children,
 ) -> impl IntoView {
+    let path = RwSignal::new(BTreeSet::<String>::new());
+
     view! {
-        <Provider value=MenuInjection(value)>
+        <Provider value=MenuInjection { value, path, default_expanded_keys: StoredValue::new(default_expanded_keys) }>
             <div class=class_list!["thaw-menu", class.map(| c | move || c.get())]>{children()}</div>
         </Provider>
     }
 }
 
 #[derive(Clone)]
-pub(crate) struct MenuInjection(pub Model<String>);
-
-pub(crate) fn use_menu() -> MenuInjection {
-    expect_context()
+pub(crate) struct MenuInjection {
+    pub value: Model<String>,
+    pub path: RwSignal<BTreeSet<String>>,
+    pub default_expanded_keys: StoredValue<Vec<String>>,
+}
+
+impl MenuInjection {
+    pub fn use_() -> Self {
+        expect_context()
+    }
 }