diff --git a/exercises/classes/exo.js b/exercises/classes/exo.js
index c8765c4..d18264a 100644
--- a/exercises/classes/exo.js
+++ b/exercises/classes/exo.js
@@ -1,7 +1,33 @@
 class Cat {
+
+  constructor(name) {
+    this.name = name;
+  }
+
+  meow() {
+    console.log('meow');
+  }
+
+  play() {
+    console.log('play');
+  }
 }
 
-class MainCoon {
+class MainCoon extends Cat {
+
+  constructor(name, color) {
+    super(name);
+    this.color = color;
+  }
+
+  play() {
+    super.play();
+    console.log('Super play');
+  }
+
+  sleep() {
+    console.log('Super sleep')
+  }
 }
 
 module.exports = {Cat, MainCoon};