diff --git a/Observer/Observer.php b/Observer/Observer.php
index 5b7aacd..ea92b42 100644
--- a/Observer/Observer.php
+++ b/Observer/Observer.php
@@ -25,6 +25,8 @@ class UserObserver implements \SplObserver
 
 class User implements \SplSubject
 {
+    protected $_data = array();
+
     /**
      * @var array
      */
@@ -68,4 +70,20 @@ class User implements \SplSubject
             $observer->update($this);
         }
     }
+
+    /**
+     * Ideally one would better write setter/getter for all valid attributes and only call notify()
+     * on attributes that matter when changed
+     *
+     * @param $name
+     * @param $value
+     * @return void
+     */
+    public function __set($name, $value)
+    {
+        $this->_data[$name] = $value;
+
+        // notify the observers, that user has been updated
+        $this->notify();
+    }
 }
\ No newline at end of file