diff --git a/packages/frontend/assets/room/objects/newtons-cradle/newtons-cradle.blend b/packages/frontend/assets/room/objects/newtons-cradle/newtons-cradle.blend
new file mode 100644
index 0000000000..3a79171e48
Binary files /dev/null and b/packages/frontend/assets/room/objects/newtons-cradle/newtons-cradle.blend differ
diff --git a/packages/frontend/assets/room/objects/newtons-cradle/newtons-cradle.glb b/packages/frontend/assets/room/objects/newtons-cradle/newtons-cradle.glb
new file mode 100644
index 0000000000..c9016a0633
Binary files /dev/null and b/packages/frontend/assets/room/objects/newtons-cradle/newtons-cradle.glb differ
diff --git a/packages/frontend/src/utility/room/object-defs.ts b/packages/frontend/src/utility/room/object-defs.ts
index 37f738a6c4..6fd44dc742 100644
--- a/packages/frontend/src/utility/room/object-defs.ts
+++ b/packages/frontend/src/utility/room/object-defs.ts
@@ -49,6 +49,7 @@ import { monitor } from './objects/monitor.js';
 import { monitorSpeaker } from './objects/monitorSpeaker.js';
 import { monstera } from './objects/monstera.js';
 import { mug } from './objects/mug.js';
+import { newtonsCradle } from './objects/newtonsCradle.js';
 import { openedCardboardBox } from './objects/openedCardboardBox.js';
 import { pachira } from './objects/pachira.js';
 import { pc } from './objects/pc.js';
@@ -138,6 +139,7 @@ export const OBJECT_DEFS = [
 	monitorSpeaker,
 	monstera,
 	mug,
+	newtonsCradle,
 	openedCardboardBox,
 	pachira,
 	pc,
diff --git a/packages/frontend/src/utility/room/objects/newtonsCradle.ts b/packages/frontend/src/utility/room/objects/newtonsCradle.ts
new file mode 100644
index 0000000000..9ce7514b8d
--- /dev/null
+++ b/packages/frontend/src/utility/room/objects/newtonsCradle.ts
@@ -0,0 +1,43 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import * as BABYLON from '@babylonjs/core';
+import { defineObject } from '../engine.js';
+
+export const newtonsCradle = defineObject({
+	id: 'newtonsCradle',
+	name: 'newtonsCradle',
+	options: {
+		schema: {
+			frameColor: {
+				type: 'color',
+				label: 'Frame color',
+			},
+		},
+		default: {
+			frameColor: [0.15, 0.15, 0.15],
+		},
+	},
+	placement: 'top',
+	createInstance: ({ options, model }) => {
+		const frameMaterial = model.findMaterial('__X_FRAME__');
+
+		const applyFrameColor = () => {
+			const [r, g, b] = options.frameColor;
+			frameMaterial.albedoColor = new BABYLON.Color3(r, g, b);
+		};
+
+		applyFrameColor();
+
+		return {
+			onOptionsUpdated: ([k, v]) => {
+				switch (k) {
+					case 'frameColor': applyFrameColor(); break;
+				}
+			},
+			interactions: {},
+		};
+	},
+});