diff --git a/gutenberg.php b/gutenberg.php
index a8e822b1ea4ee..7ab481538e32c 100644
--- a/gutenberg.php
+++ b/gutenberg.php
@@ -43,14 +43,16 @@ function gutenberg_menu() {
 		'gutenberg'
 	);
 
-	add_submenu_page(
-		'gutenberg',
-		__( 'Widgets (beta)', 'gutenberg' ),
-		__( 'Widgets (beta)', 'gutenberg' ),
-		'edit_theme_options',
-		'gutenberg-widgets',
-		'the_gutenberg_widgets'
-	);
+	if ( get_option( 'gutenberg-experiments' ) && array_key_exists( 'gutenberg-widget-experiments', get_option( 'gutenberg-experiments' ) ) ) {
+		add_submenu_page(
+			'gutenberg',
+			__( 'Widgets (beta)', 'gutenberg' ),
+			__( 'Widgets (beta)', 'gutenberg' ),
+			'edit_theme_options',
+			'gutenberg-widgets',
+			'the_gutenberg_widgets'
+		);
+	}
 
 	if ( current_user_can( 'edit_posts' ) ) {
 		$submenu['gutenberg'][] = array(
@@ -65,6 +67,15 @@ function gutenberg_menu() {
 			'https://developer.wordpress.org/block-editor/',
 		);
 	}
+
+	add_submenu_page(
+		'gutenberg',
+		__( 'Experiments Settings', 'gutenberg' ),
+		__( 'Experiments', 'gutenberg' ),
+		'edit_posts',
+		'gutenberg-experiments',
+		'the_gutenberg_experiments'
+	);
 }
 add_action( 'admin_menu', 'gutenberg_menu' );
 
diff --git a/lib/experiments-page.php b/lib/experiments-page.php
new file mode 100644
index 0000000000000..0ca203444dc81
--- /dev/null
+++ b/lib/experiments-page.php
@@ -0,0 +1,120 @@
+<?php
+/**
+ * Bootstraping the Gutenberg experiments page.
+ *
+ * @package gutenberg
+ */
+
+/**
+ * The main entry point for the Gutenberg experiments page.
+ *
+ * @since 6.3.0
+ *
+ * @param string $page The page name the function is being called for, `'gutenberg_customizer'` for the Customizer.
+ */
+function the_gutenberg_experiments( $page = 'gutenberg_page_gutenberg-experiments' ) {
+	?>
+	<div
+		id="experiments-editor"
+		class="wrap"
+	>
+	<h1><?php echo __( 'Experiment settings', 'gutenberg' ); ?></h1>
+	<?php settings_errors(); ?>
+	<form method="post" action="options.php">
+		<?php settings_fields( 'gutenberg-experiments' ); ?>
+		<?php do_settings_sections( 'gutenberg-experiments' ); ?>           
+		<?php submit_button(); ?>
+	</form>
+	</div>
+	<?php
+}
+
+/**
+ * Set up the experiments settings.
+ *
+ * @since 6.3.0
+ */
+function gutenberg_initialize_experiments_settings() {
+	add_settings_section(
+		'gutenberg_experiments_section',
+		// The empty string ensures the render function won't output a h2.
+		'',
+		'gutenberg_display_experiment_section',
+		'gutenberg-experiments'
+	);
+	add_settings_field(
+		'gutenberg-widget-experiments',
+		__( 'Widgets', 'gutenberg' ),
+		'gutenberg_display_experiment_field',
+		'gutenberg-experiments',
+		'gutenberg_experiments_section',
+		array(
+			'label' => __( 'Enable Widgets Screen and Legacy Widget Block', 'gutenberg' ),
+			'id'    => 'gutenberg-widget-experiments',
+		)
+	);
+	add_settings_field(
+		'gutenberg-menu-block',
+		__( 'Menu Block', 'gutenberg' ),
+		'gutenberg_display_experiment_field',
+		'gutenberg-experiments',
+		'gutenberg_experiments_section',
+		array(
+			'label' => __( 'Enable Navigation Menu Block', 'gutenberg' ),
+			'id'    => 'gutenberg-menu-block',
+		)
+	);
+	register_setting(
+		'gutenberg-experiments',
+		'gutenberg-experiments'
+	);
+}
+
+add_action( 'admin_init', 'gutenberg_initialize_experiments_settings' );
+
+/**
+ * Display a checkbox field for a Gutenberg experiment.
+ *
+ * @since 6.3.0
+ *
+ * @param array $args ( $label, $id ).
+ */
+function gutenberg_display_experiment_field( $args ) {
+	$options = get_option( 'gutenberg-experiments' );
+	$value   = isset( $options[ $args['id'] ] ) ? 1 : 0;
+	?>
+		<label for="<?php echo $args['id']; ?>">
+			<input type="checkbox" name="<?php echo 'gutenberg-experiments[' . $args['id'] . ']'; ?>" id="<?php echo $args['id']; ?>" value="1" <?php checked( 1, $value ); ?> />
+			<?php echo $args['label']; ?>
+		</label>
+	<?php
+}
+
+/**
+ * Display the experiments section.
+ *
+ * @since 6.3.0
+ */
+function gutenberg_display_experiment_section() {
+	?>
+	<p><?php echo __( 'Gutenberg has some experimental features you can turn on. Simply select each you would like to use. These features are likely to change so it is inadvisable to use them in production.', 'gutenberg' ); ?></p>
+
+	<?php
+}
+
+/**
+ * Extends default editor settings with experiments settings.
+ *
+ * @param array $settings Default editor settings.
+ *
+ * @return array Filtered editor settings.
+ */
+function gutenberg_experiments_editor_settings( $settings ) {
+	$experiments_exist    = get_option( 'gutenberg-experiments' );
+	$experiments_settings = array(
+		'__experimentalEnableLegacyWidgetBlock' => $experiments_exist ? array_key_exists( 'gutenberg-widget-experiments', get_option( 'gutenberg-experiments' ) ) : false,
+		'__experimentalEnableMenuBlock'         => $experiments_exist ? array_key_exists( 'gutenberg-menu-block', get_option( 'gutenberg-experiments' ) ) : false,
+	);
+	return array_merge( $settings, $experiments_settings );
+}
+add_filter( 'block_editor_settings', 'gutenberg_experiments_editor_settings' );
diff --git a/lib/load.php b/lib/load.php
index c34a8d4fc4d40..f97db4e38eb89 100644
--- a/lib/load.php
+++ b/lib/load.php
@@ -35,4 +35,5 @@
 require dirname( __FILE__ ) . '/demo.php';
 require dirname( __FILE__ ) . '/widgets.php';
 require dirname( __FILE__ ) . '/widgets-page.php';
+require dirname( __FILE__ ) . '/experiments-page.php';
 require dirname( __FILE__ ) . '/customizer.php';
diff --git a/packages/block-editor/README.md b/packages/block-editor/README.md
index 36a256f93cb68..477c8657e40db 100644
--- a/packages/block-editor/README.md
+++ b/packages/block-editor/README.md
@@ -382,7 +382,9 @@ The default editor settings
  bodyPlaceholder                        string        Empty post placeholder
  titlePlaceholder                       string        Empty title placeholder
  codeEditingEnabled                     string        Whether or not the user can switch to the code editor
- \_\_experimentalCanUserUseUnfilteredHTML string        Whether the user should be able to use unfiltered HTML or the HTML should be filtered e.g., to remove elements considered insecure like iframes.
+ **experimentalCanUserUseUnfilteredHTML string        Whether the user should be able to use unfiltered HTML or the HTML should be filtered e.g., to remove elements considered insecure like iframes.
+ **experimentalEnableLegacyWidgetBlock  boolean       Whether the user has enabled the Legacy Widget Block
+ \_\_experimentalEnableMenuBlock          boolean       Whether the user has enabled the Menu Block
 
 <a name="SkipToSelectedBlock" href="#SkipToSelectedBlock">#</a> **SkipToSelectedBlock**
 
diff --git a/packages/block-editor/src/store/defaults.js b/packages/block-editor/src/store/defaults.js
index 1f91e29c7e2f5..885a8b79f7fb0 100644
--- a/packages/block-editor/src/store/defaults.js
+++ b/packages/block-editor/src/store/defaults.js
@@ -28,6 +28,8 @@ export const PREFERENCES_DEFAULTS = {
  *  titlePlaceholder                       string        Empty title placeholder
  *  codeEditingEnabled                     string        Whether or not the user can switch to the code editor
  *  __experimentalCanUserUseUnfilteredHTML string        Whether the user should be able to use unfiltered HTML or the HTML should be filtered e.g., to remove elements considered insecure like iframes.
+ *  __experimentalEnableLegacyWidgetBlock  boolean       Whether the user has enabled the Legacy Widget Block
+ *  __experimentalEnableMenuBlock          boolean       Whether the user has enabled the Menu Block
  */
 export const SETTINGS_DEFAULTS = {
 	alignWide: false,
@@ -144,5 +146,7 @@ export const SETTINGS_DEFAULTS = {
 	availableLegacyWidgets: {},
 	hasPermissionsToManageWidgets: false,
 	__experimentalCanUserUseUnfilteredHTML: false,
+	__experimentalEnableLegacyWidgetBlock: false,
+	__experimentalEnableMenuBlock: false,
 };
 
diff --git a/packages/block-library/src/index.js b/packages/block-library/src/index.js
index a9a9b78f34ca9..0d313bc171b20 100644
--- a/packages/block-library/src/index.js
+++ b/packages/block-library/src/index.js
@@ -62,6 +62,23 @@ import * as tagCloud from './tag-cloud';
 
 import * as classic from './classic';
 
+/**
+ * Function to register an individual block.
+ *
+ * @param {Object} block The block to be registered.
+ *
+ */
+const registerBlock = ( block ) => {
+	if ( ! block ) {
+		return;
+	}
+	const { metadata, settings, name } = block;
+	if ( metadata ) {
+		unstable__bootstrapServerSideBlockDefinitions( { [ name ]: metadata } ); // eslint-disable-line camelcase
+	}
+	registerBlockType( name, settings );
+};
+
 /**
  * Function to register core blocks provided by the block editor.
  *
@@ -104,11 +121,8 @@ export const registerCoreBlocks = () => {
 		mediaText,
 		latestComments,
 		latestPosts,
-		process.env.GUTENBERG_PHASE === 2 ? legacyWidget : null,
 		missing,
 		more,
-		process.env.GUTENBERG_PHASE === 2 ? navigationMenu : null,
-		process.env.GUTENBERG_PHASE === 2 ? navigationMenuItem : null,
 		nextpage,
 		preformatted,
 		pullquote,
@@ -124,16 +138,7 @@ export const registerCoreBlocks = () => {
 		textColumns,
 		verse,
 		video,
-	].forEach( ( block ) => {
-		if ( ! block ) {
-			return;
-		}
-		const { metadata, settings, name } = block;
-		if ( metadata ) {
-			unstable__bootstrapServerSideBlockDefinitions( { [ name ]: metadata } ); // eslint-disable-line camelcase
-		}
-		registerBlockType( name, settings );
-	} );
+	].forEach( registerBlock );
 
 	setDefaultBlockName( paragraph.name );
 	if ( window.wp && window.wp.oldEditor ) {
@@ -145,3 +150,25 @@ export const registerCoreBlocks = () => {
 		setGroupingBlockName( group.name );
 	}
 };
+
+/**
+ * Function to register experimental core blocks depending on editor settings.
+ *
+ * @param {Object} settings Editor settings.
+ *
+ * @example
+ * ```js
+ * import { __experimentalRegisterExperimentalCoreBlocks } from '@wordpress/block-library';
+ *
+ * __experimentalRegisterExperimentalCoreBlocks( settings );
+ * ```
+ */
+export const __experimentalRegisterExperimentalCoreBlocks = process.env.GUTENBERG_PHASE === 2 ? ( settings ) => {
+	const { __experimentalEnableLegacyWidgetBlock, __experimentalEnableMenuBlock } = settings;
+
+	[
+		__experimentalEnableLegacyWidgetBlock ? legacyWidget : null,
+		__experimentalEnableMenuBlock ? navigationMenu : null,
+		__experimentalEnableMenuBlock ? navigationMenuItem : null,
+	].forEach( registerBlock );
+} : undefined;
diff --git a/packages/block-library/src/navigation-menu/index.js b/packages/block-library/src/navigation-menu/index.js
index 8ca8e0c3fe560..a7343c61100b4 100644
--- a/packages/block-library/src/navigation-menu/index.js
+++ b/packages/block-library/src/navigation-menu/index.js
@@ -26,7 +26,7 @@ export const settings = {
 		align: [ 'wide', 'full' ],
 		anchor: true,
 		html: false,
-		inserter: false,
+		inserter: true,
 	},
 
 	edit,
diff --git a/packages/e2e-test-utils/src/enable-experimental-features.js b/packages/e2e-test-utils/src/enable-experimental-features.js
new file mode 100644
index 0000000000000..fcb47843b54b9
--- /dev/null
+++ b/packages/e2e-test-utils/src/enable-experimental-features.js
@@ -0,0 +1,27 @@
+/**
+ * WordPress dependencies
+ */
+import { addQueryArgs } from '@wordpress/url';
+
+/**
+ * Internal dependencies
+ */
+import { visitAdminPage } from './visit-admin-page';
+
+/**
+ * Enables experimental features from the plugin settings section.
+ *
+ * @param {Array} features Array of {string} selectors of settings to enable. Assumes they can be enabled with one click.
+ */
+export async function enableExperimentalFeatures( features ) {
+	const query = addQueryArgs( '', {
+		page: 'gutenberg-experiments',
+	} );
+	await visitAdminPage( '/admin.php', query );
+
+	await Promise.all( features.map( async ( feature ) => {
+		await page.waitForSelector( feature );
+		await page.click( feature );
+		await page.click( '#submit' );
+	} ) );
+}
diff --git a/packages/e2e-test-utils/src/index.js b/packages/e2e-test-utils/src/index.js
index c6839ac84f1d5..06d898b31fc37 100644
--- a/packages/e2e-test-utils/src/index.js
+++ b/packages/e2e-test-utils/src/index.js
@@ -11,6 +11,7 @@ export { createURL } from './create-url';
 export { deactivatePlugin } from './deactivate-plugin';
 export { disablePrePublishChecks } from './disable-pre-publish-checks';
 export { dragAndResize } from './drag-and-resize';
+export { enableExperimentalFeatures } from './enable-experimental-features';
 export { enablePageDialogAccept } from './enable-page-dialog-accept';
 export { enablePrePublishChecks } from './enable-pre-publish-checks';
 export { ensureSidebarOpened } from './ensure-sidebar-opened';
diff --git a/packages/e2e-tests/specs/block-transforms.test.js b/packages/e2e-tests/specs/block-transforms.test.js
index 89d14bf524491..381facd4c0067 100644
--- a/packages/e2e-tests/specs/block-transforms.test.js
+++ b/packages/e2e-tests/specs/block-transforms.test.js
@@ -19,6 +19,7 @@ import {
 	getEditedPostContent,
 	hasBlockSwitcher,
 	createNewPost,
+	enableExperimentalFeatures,
 	setPostContent,
 	selectBlockByClientId,
 	transformBlockTo,
@@ -99,6 +100,7 @@ describe( 'Block transforms', () => {
 
 	const transformStructure = {};
 	beforeAll( async () => {
+		await enableExperimentalFeatures( [ '#gutenberg-widget-experiments', '#gutenberg-menu-block' ] );
 		await createNewPost();
 
 		for ( const fileBase of fileBasenames ) {
diff --git a/packages/edit-post/src/index.js b/packages/edit-post/src/index.js
index 8027695313a6f..531f8e1c0267e 100644
--- a/packages/edit-post/src/index.js
+++ b/packages/edit-post/src/index.js
@@ -7,7 +7,7 @@ import '@wordpress/editor';
 import '@wordpress/nux';
 import '@wordpress/viewport';
 import '@wordpress/notices';
-import { registerCoreBlocks } from '@wordpress/block-library';
+import { registerCoreBlocks, __experimentalRegisterExperimentalCoreBlocks } from '@wordpress/block-library';
 import { render, unmountComponentAtNode } from '@wordpress/element';
 
 /**
@@ -65,8 +65,10 @@ export function reinitializeEditor( postType, postId, target, settings, initialE
 export function initializeEditor( id, postType, postId, settings, initialEdits ) {
 	const target = document.getElementById( id );
 	const reboot = reinitializeEditor.bind( null, postType, postId, target, settings, initialEdits );
-
 	registerCoreBlocks();
+	if ( process.env.GUTENBERG_PHASE === 2 ) {
+		__experimentalRegisterExperimentalCoreBlocks( settings );
+	}
 
 	// Show a console log warning if the browser is not in Standards rendering mode.
 	const documentMode = document.compatMode === 'CSS1Compat' ? 'Standards' : 'Quirks';
diff --git a/packages/edit-widgets/src/index.js b/packages/edit-widgets/src/index.js
index 16035513da954..7efa0d6c5a4dd 100644
--- a/packages/edit-widgets/src/index.js
+++ b/packages/edit-widgets/src/index.js
@@ -3,7 +3,7 @@
  */
 import '@wordpress/notices';
 import { render } from '@wordpress/element';
-import { registerCoreBlocks } from '@wordpress/block-library';
+import { registerCoreBlocks, __experimentalRegisterExperimentalCoreBlocks } from '@wordpress/block-library';
 
 /**
  * Internal dependencies
@@ -21,6 +21,9 @@ import CustomizerEditWidgetsInitializer from './components/customizer-edit-widge
  */
 export function initialize( id, settings ) {
 	registerCoreBlocks();
+	if ( process.env.GUTENBERG_PHASE === 2 ) {
+		__experimentalRegisterExperimentalCoreBlocks( settings );
+	}
 	render(
 		<EditWidgetsInitializer
 			settings={ settings }
diff --git a/packages/editor/src/components/provider/index.js b/packages/editor/src/components/provider/index.js
index cfa67ddbb615d..b11341e1a33f0 100644
--- a/packages/editor/src/components/provider/index.js
+++ b/packages/editor/src/components/provider/index.js
@@ -99,6 +99,8 @@ class EditorProvider extends Component {
 				'template',
 				'templateLock',
 				'titlePlaceholder',
+				'__experimentalEnableLegacyWidgetBlock',
+				'__experimentalEnableMenuBlock',
 			] ),
 			__experimentalReusableBlocks: reusableBlocks,
 			__experimentalMediaUpload: hasUploadPermissions ? mediaUpload : undefined,
diff --git a/test/integration/full-content/full-content.spec.js b/test/integration/full-content/full-content.spec.js
index cd5308e92b081..c4c7b9c6b0dc7 100644
--- a/test/integration/full-content/full-content.spec.js
+++ b/test/integration/full-content/full-content.spec.js
@@ -14,7 +14,7 @@ import {
 	unstable__bootstrapServerSideBlockDefinitions, // eslint-disable-line camelcase
 } from '@wordpress/blocks';
 import { parse as grammarParse } from '@wordpress/block-serialization-default-parser';
-import { registerCoreBlocks } from '@wordpress/block-library';
+import { registerCoreBlocks, __experimentalRegisterExperimentalCoreBlocks } from '@wordpress/block-library';
 import { //eslint-disable-line no-restricted-syntax
 	blockNameToFixtureBasename,
 	getAvailableBlockFixturesBasenames,
@@ -48,10 +48,13 @@ function normalizeParsedBlocks( blocks ) {
 describe( 'full post content fixture', () => {
 	beforeAll( () => {
 		unstable__bootstrapServerSideBlockDefinitions( require( './server-registered.json' ) );
-
+		const settings = { __experimentalEnableLegacyWidgetBlock: true, __experimentalEnableMenuBlock: true };
 		// Load all hooks that modify blocks
 		require( '../../../packages/editor/src/hooks' );
 		registerCoreBlocks();
+		if ( process.env.GUTENBERG_PHASE === 2 ) {
+			__experimentalRegisterExperimentalCoreBlocks( settings );
+		}
 	} );
 
 	blockBasenames.forEach( ( basename ) => {