diff --git a/sesion3/index.js b/sesion3/index.js
new file mode 100644
index 0000000..e8de8ca
--- /dev/null
+++ b/sesion3/index.js
@@ -0,0 +1,40 @@
+class User {
+    constructor(name, email, age) {
+        this.name = name;
+        this.email = email;
+        this.age = age;
+    }
+}
+
+class Song {
+    constructor(category, author, title) {
+        this.category = category;
+        this.author = author;
+        this.title = title;
+    }
+}
+
+class Playlist {
+    constructor(title) {
+        this.title = title;
+        this.playlist = {};
+    }
+}
+
+Playlist.prototype.add = function (id, playlist) {
+    this.playlist[id] = playlist;
+}
+
+Playlist.prototype.remove = function (id) {
+    delete this.playlist[id];
+}
+
+let s = new Song('cat1', 'Author1', 'title1');
+let t = new Song('cat2', 'Author2', 'title2');
+
+let r = new Playlist('miscelanea');
+
+r.add(12, s);
+r.add(15, t);
+r.remove(12);
+console.log(r);