diff --git a/01 - JavaScript Drum Kit/index-START.html b/01 - JavaScript Drum Kit/index-START.html
index 8a2f8e8417..e06577c8ac 100644
--- a/01 - JavaScript Drum Kit/index-START.html	
+++ b/01 - JavaScript Drum Kit/index-START.html	
@@ -60,6 +60,24 @@
 
 <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/07 - Array Cardio Day 2/index-START.html b/07 - Array Cardio Day 2/index-START.html
index 4ca34c7536..b1f362cc92 100644
--- a/07 - Array Cardio Day 2/index-START.html	
+++ b/07 - Array Cardio Day 2/index-START.html	
@@ -25,17 +25,29 @@
       { text: 'Nice Nice Nice!', id: 542328 }
     ];
 
-    // Some and Every Checks
-    // Array.prototype.some() // is at least one person 19 or older?
-    // Array.prototype.every() // is everyone 19 or older?
+    const isAdult = people.every(person => ((new Date()).getFullYear()) - person.year >= 19);
+
+    console.log({isAdult});
 
     // Array.prototype.find()
     // Find is like filter, but instead returns just the one you are looking for
     // find the comment with the ID of 823423
 
+    const comment = comments.find(comment => comment.id === 823423);
+    console.log(comment);
+
     // Array.prototype.findIndex()
     // Find the comment with this ID
     // delete the comment with the ID of 823423
+    const index = comments.findIndex(comment => comment.id === 823423);
+    console.log(index);
+
+    // comments.splice(index, 1);
+
+    const newComments = [
+      ...comments.slice(0, index),
+      ...comments.slice(index + 1)
+    ];
 
   </script>
 </body>