diff --git a/01 - JavaScript Drum Kit/index-START.html b/01 - JavaScript Drum Kit/index-START.html
index 8a2f8e8417..7203b49288 100644
--- a/01 - JavaScript Drum Kit/index-START.html
+++ b/01 - JavaScript Drum Kit/index-START.html
@@ -5,6 +5,7 @@
JS Drum Kit
+
diff --git a/01 - JavaScript Drum Kit/myattempt.js b/01 - JavaScript Drum Kit/myattempt.js
new file mode 100644
index 0000000000..ae465e80c3
--- /dev/null
+++ b/01 - JavaScript Drum Kit/myattempt.js
@@ -0,0 +1,30 @@
+function setUpKeys() {
+ const keylist = document.querySelectorAll(".key");
+
+ keylist.forEach((key) => {
+ key.addEventListener('transitionend', removeTransition);
+ });
+
+}
+
+function removeTransition(e) {
+ if (e.propertyName !== 'transform')
+ return;
+
+
+ this.classList.remove('playing');
+}
+
+function playSound(e) {
+ const audio = this.document.querySelector(`audio[data-key="${e.keyCode}"]`);
+ const key = this.document.querySelector(`.key[data-key="${e.keyCode}"]`);
+
+ if (!audio) return;
+ audio.currentTime = 0;
+ audio.play();
+
+ key.classList.add('playing');
+}
+
+setUpKeys();
+window.addEventListener('keydown', playSound);
diff --git a/04 - Array Cardio Day 1/index-START.html b/04 - Array Cardio Day 1/index-START.html
index 0dcfd00f40..f5b6c1f133 100644
--- a/04 - Array Cardio Day 1/index-START.html
+++ b/04 - Array Cardio Day 1/index-START.html
@@ -38,6 +38,7 @@
// Array.prototype.filter()
// 1. Filter the list of inventors for those who were born in the 1500's
+ inventors.filter(item => item.year >= 1500 && item.year < 1600);
// Array.prototype.map()
// 2. Give us an array of the inventors first and last names
diff --git a/25 - Event Capture, Propagation, Bubbling and Once/index-START.html b/25 - Event Capture, Propagation, Bubbling and Once/index-START.html
index 35783bff72..360982e041 100644
--- a/25 - Event Capture, Propagation, Bubbling and Once/index-START.html
+++ b/25 - Event Capture, Propagation, Bubbling and Once/index-START.html
@@ -43,6 +43,14 @@