diff --git a/01 - JavaScript Drum Kit/index-START.html b/01 - JavaScript Drum Kit/index-START.html
index 8a2f8e8417..e56247e754 100644
--- a/01 - JavaScript Drum Kit/index-START.html	
+++ b/01 - JavaScript Drum Kit/index-START.html	
@@ -59,6 +59,26 @@
   <audio data-key="76" src="sounds/tink.wav"></audio>
 
 <script>
+function playSound(e) {
+  const audio = document.querySelector(`audio[data-key="${e.keyCode}"]`);
+  const key = document.querySelector(`.key[data-key="${e.keyCode}"]`);
+
+  if (!audio) return;  
+  audio.currentTime = 0;  
+  audio.play();
+
+  key.classList.add('playing');
+}
+
+function removeTransition(e) {
+  if (e.propertyName !== 'transform') return;
+  this.classList.remove('playing');
+};
+
+const keys = document.querySelectorAll('.key');
+keys.forEach(key => key.addEventListener('transitionend', removeTransition));
+window.addEventListener('keydown', playSound );
+
 
 </script>
 
diff --git a/02 - JS and CSS Clock/index-START.html b/02 - JS and CSS Clock/index-START.html
index 55ab1a5331..9ee6a6cfa3 100644
--- a/02 - JS and CSS Clock/index-START.html	
+++ b/02 - JS and CSS Clock/index-START.html	
@@ -63,12 +63,37 @@
       background: black;
       position: absolute;
       top: 50%;
+      transform-origin: 100%;
+      transform: rotate(90deg);
     }
 
   </style>
 
   <script>
 
+  const secondHand = document.querySelector('.second-hand');
+  const minsHand = document.querySelector('.min-hand');
+  const hourHand = document.querySelector('.hour-hand');
+
+  function setDate() {
+    const now = new Date();
+
+    const seconds = now.getSeconds();
+    const secondsDegrees = ((seconds / 60) * 360) + 90;
+    secondHand.style.transform = `rotate(${secondsDegrees}deg)`;
+
+    const mins = now.getMinutes();
+    const minsDegrees = ((mins / 60) * 360) + ((seconds/60)*6) + 90;
+    minsHand.style.transform = `rotate(${minsDegrees}deg)`;
+
+    const hour = now.getHours();
+    const hourDegrees = ((hour / 12) * 360) + ((mins/60)*30) + 90;
+    hourHand.style.transform = `rotate(${hourDegrees}deg)`;
+  }
+
+  setInterval(setDate, 1000);
+
+  setDate();
 
   </script>
 </body>
diff --git a/03 - CSS Variables/index-START.html b/03 - CSS Variables/index-START.html
index d5fcc3a2ae..213383e606 100644
--- a/03 - CSS Variables/index-START.html	
+++ b/03 - CSS Variables/index-START.html	
@@ -26,6 +26,21 @@ <h2>Update CSS Variables with <span class='hl'>JS</span></h2>
     /*
       misc styles, nothing to do with CSS variables
     */
+    :root {
+      --base: #ffc600;
+      --spacing: 10px;
+      --blur: 10px;
+    }
+
+    img {
+      padding: var(--spacing);
+      background: var(--base);
+      filter: blur(var(--blur));
+    }
+
+    .hl {
+      color: var(--base);
+    }
 
     body {
       text-align: center;
@@ -46,6 +61,29 @@ <h2>Update CSS Variables with <span class='hl'>JS</span></h2>
   </style>
 
   <script>
+
+    const root = document.querySelector(':root');
+
+    function changeValues(selector = "base", property = "--base") {
+      
+      let element = `#${selector}`;
+      element = document.querySelector(element);
+
+      element.addEventListener('change', (e) => {
+
+        let value = element.value;
+        !value.includes("#") ?  value =`${value}px` : value;
+        root.style.setProperty( property, value );
+
+      });
+      
+    }
+    
+    changeValues();
+    changeValues( "spacing", "--spacing" );
+    changeValues( "blur", "--blur" );
+    
+
   </script>
 
 </body>