basic two way binding

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  name:Ember.Object.create({age:null}),
  actions:{
    changeName(){
      console.log(this.get('name'));
      let name= this.get('name');
      //name.age=5;
      //Ember.set(name,'age',5);
      //name.set('age',10);
    }
  }
});

services.my-service.js

import Ember from 'ember';

export default Ember.Service.extend({
});

templates.application.hbs

<h1 {{action 'changeName'}}>Welcome to {{appName}}</h1>
<br>
{{log 'name.age' name.age}}
{{name.age}}
<br>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}