New Twiddle

components.my-component.js

import Ember from 'ember';

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

components.wrapper-component.js

import Ember from 'ember';

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

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  prop: 0,
  
  actions: {
  	increase() {
    	this.set('prop', this.get('prop') + 1)
    }
  }
});

templates.application.hbs

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

<button {{action (action 'increase')}}>Increase prop</button>

{{component 'my-component' prop=prop}}

<br>
<br>

{{wrapper-component 
	content=(component 'my-component' prop=prop)
}}

templates.components.my-component.hbs

<div style='border: 1px black solid'>
  <div>My component</div>
  <div>prop: {{prop}}</div>
</div>

templates.components.wrapper-component.hbs

<div style='border: 3px black solid'>
  wrapper component
	{{component content}}
</div>

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"
  }
}