New Twiddle

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  firstName:'joe',
  lastName:'dirt'
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>

{{firstName}}
{{section-1 fn=firstName}}

section-1.component.js

import Ember from 'ember';

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

section-1.template.hbs

{{input value=fn}}

section-2.component.js

import Ember from 'ember';

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

section-2.template.hbs

{{yield}}

twiddle.json

{
  "version": "0.4.10",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.9/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.11/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.9/ember-template-compiler.js"
  }
}