diff --git a/.gitignore b/.gitignore
index c2658d7..78f2710 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 node_modules/
+.idea/
diff --git a/src/class_spec.js b/src/class_spec.js
new file mode 100644
index 0000000..de7c0e0
--- /dev/null
+++ b/src/class_spec.js
@@ -0,0 +1,64 @@
+/**
+ * Created by towershine on 12/13/16.
+ */
+import test from 'tape';
+import {Animal, Reptile, Primate, Human} from './index_classes';
+
+
+test('Test to see if a new "Animal" instance can be created', function (test) {
+    const animal = new Animal();
+    test.ok( animal instanceof Animal, 'should create an instance of Animal');
+    test.end();
+});
+
+test('Test to see if the Animal type has a "speak" method', function (test) {
+
+    const animal = new Animal();
+    const expected = 'generic sound';
+    const actual = animal.speak();
+
+    test.equal( actual, expected, 'should make a generic sound when it speaks' );
+    test.end();
+});
+
+test('Test to see if "Primates" and "Reptiles" can be made from "Animals"', function (test) {
+
+    let actual, expected;
+
+    const reptile = new Reptile();
+
+    test.ok( reptile instanceof Reptile, 'should be an instance of Reptile' );
+    test.ok( reptile instanceof Animal, 'should be an instance of Animal' );
+
+    expected = Reptile.SOUND;
+    actual = reptile.speak();
+    test.equal( actual, expected, 'should make a reptile sound when it speaks' );
+
+    const primate = new Primate();
+
+    test.ok( primate instanceof Primate, 'should be an instance of Primate' );
+    test.ok( primate instanceof Animal, 'should be an instance of Animal' );
+
+    expected = Primate.SOUND;
+    actual = primate.speak();
+    test.equal( actual, expected, 'should make a primate sound when it speaks' );
+
+    test.end();
+});
+
+test('Test to see if a human can be made and it can speak', function (test) {
+
+    let actual, expected;
+
+    const human = new Human();
+
+    test.ok( human instanceof Human, 'should be an instance of Human' );
+    test.ok( human instanceof Primate, 'should be an instance of Primate' );
+    test.ok( human instanceof Animal, 'should be an instance of Animal' );
+
+    const message = 'hello';
+    expected = message;
+    actual = human.speak( message );
+    test.equal( actual, expected, 'should speak what it is asked to speak' );
+    test.end();
+});
\ No newline at end of file
diff --git a/src/index.js b/src/index.js
index 5237ff4..d35435f 100644
--- a/src/index.js
+++ b/src/index.js
@@ -13,14 +13,22 @@ export function doubleXTimes ( x, num ) {
   return result;
 }
 
-export function doubleEach ( arr ) {
-  let result = arr.map( double );
+export const doubleEach = x => x.map(double);
 
-  // const result = arr.map( x => double( x ) );
-  // const result = arr.map( function ( x ) {
-  //   return double( x );
-  // });
+export function Animal(){}
+Animal.SOUND = 'generic sound';
+Animal.prototype.speak = function () {return Animal.SOUND};
 
-  return result;
-}
+export function Reptile(){}
+Reptile.SOUND = 'Roar';
+Reptile.prototype = Object.create(Animal.prototype);
+Reptile.prototype.speak = function () {return Reptile.SOUND};
+
+export function Primate(){}
+Primate.SOUND = 'Ooh ooh eee!';
+Primate.prototype = Object.create(Animal.prototype);
+Primate.prototype.speak = function () {return Primate.SOUND};
 
+export function Human(){}
+Human.prototype = Object.create(Primate.prototype);
+Human.prototype.speak = function (message) {return message};
diff --git a/src/index_classes.js b/src/index_classes.js
new file mode 100644
index 0000000..3b56de9
--- /dev/null
+++ b/src/index_classes.js
@@ -0,0 +1,41 @@
+export class Animal {
+    constructor () {}
+
+    static SOUND = 'generic sound';
+
+    speak() {
+        return Animal.SOUND;
+    }
+}
+
+export class Reptile extends Animal {
+    constructor () {
+        super();
+    }
+
+    static SOUND = 'Roar';
+
+    speak() {
+        return Reptile.SOUND;
+    }
+}
+
+export class Primate extends Animal {
+    constructor() {
+        super();
+    }
+
+    static SOUND = 'Ooh Ooh Eeh!';
+    speak() {
+        return Primate.SOUND;
+    }
+}
+
+export class Human extends Primate {
+    constructor() {
+        super();
+    }
+    speak(message) {
+        return message;
+    }
+}
\ No newline at end of file
diff --git a/src/spec.js b/src/spec.js
index 3e22930..bbe9f5b 100644
--- a/src/spec.js
+++ b/src/spec.js
@@ -1,30 +1,61 @@
 import test from 'tape';
-import { double, doubleXTimes, doubleEach } from './index';
+import {Animal, Reptile, Primate, Human} from './index';
 
-test( 'double fn', function ( test ) {
-  const actual = double( 5 );
-  const expected = 10;
 
-  test.equal( actual, expected, 'should double the value' );
-
-  test.end();
+test('Test to see if a new "Animal" instance can be created', function (test) {
+    const animal = new Animal();
+    test.ok( animal instanceof Animal, 'should create an instance of Animal');
+    test.end();
 });
 
-test( 'doubleXTimes', function ( test ) {
-  const actual = doubleXTimes( 5, 3 );
-  const expected = 40;
+test('Test to see if the Animal type has a "speak" method', function (test) {
 
-  test.equal( actual, expected, 'should double 5 three times' );
+    const animal = new Animal();
+    const expected = 'generic sound';
+    const actual = animal.speak();
 
-  test.end();
+    test.equal( actual, expected, 'should make a generic sound when it speaks' );
+    test.end();
 });
 
-test( 'doubleEach', function ( test ) {
-  const actual = doubleEach([ 0, 1, 2 ]);
-  const expected = [ 0, 2, 4 ];
+test('Test to see if "Primates" and "Reptiles" can be made from "Animals"', function (test) {
+
+    let actual, expected;
+
+    const reptile = new Reptile();
+
+    test.ok( reptile instanceof Reptile, 'should be an instance of Reptile' );
+    test.ok( reptile instanceof Animal, 'should be an instance of Animal' );
+
+    expected = Reptile.SOUND;
+    actual = reptile.speak();
+    test.equal( actual, expected, 'should make a reptile sound when it speaks' );
+
+    const primate = new Primate();
 
-  test.deepEqual( actual, expected, 'should double each in the array' );
+    test.ok( primate instanceof Primate, 'should be an instance of Primate' );
+    test.ok( primate instanceof Animal, 'should be an instance of Animal' );
 
-  test.end();
+    expected = Primate.SOUND;
+    actual = primate.speak();
+    test.equal( actual, expected, 'should make a primate sound when it speaks' );
+
+    test.end();
 });
 
+test('Test to see if a human can be made and it can speak', function (test) {
+
+    let actual, expected;
+
+    const human = new Human();
+
+    test.ok( human instanceof Human, 'should be an instance of Human' );
+    test.ok( human instanceof Primate, 'should be an instance of Primate' );
+    test.ok( human instanceof Animal, 'should be an instance of Animal' );
+
+    const message = 'hello';
+    expected = message;
+    actual = human.speak( message );
+    test.equal( actual, expected, 'should speak what it is asked to speak' );
+    test.end();
+});
\ No newline at end of file