JSON Parse ember object to clone?

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  stringify: Ember.computed(function() {
    let stringify = JSON.stringify(EmberObject);

    return stringify;
  }),
  parse: Ember.computed('stringify', function() {
    let parse = JSON.parse(this.get('stringify'));

    return parse;
  })
});

const EmberObject = Ember.Object.create({
    hey: "ho",
    lets: "go"
});

EmberObject.reopen({
  combined: Ember.computed('hey', 'lets', function() {
      return `hey ${this.get('hey')}, lets ${this.get('lets')}`;
    })
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
{{stringify}}

<br>
<br>

{{parse.lets}}

twiddle.json

{
  "version": "0.10.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.7.0",
    "ember-data": "2.7.0",
    "ember-template-compiler": "2.7.0"
  },
  "addons": {}
}