New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'ember-cat',
  cats: [30, 40, 200],
  log(thing) {
    console.log(thing);
	}
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
{{#each cats as |cat index|}}
  {{input type='range' value=(get cats (concat index)) min=30 max=500}}
  {{cat-picture width=(get cats (concat index))}}
  <br/>
{{/each}}
<button {{action cats.pushObject '50' target=cats}}>add cat</button>
<button {{action cats.popObject target=cats}}>delet cat</button>
<button {{action log cats}}>log cats</button>

templates.components.cat-picture.hbs

<img src="http://www.cuidatusmascotas.com/wp-content/uploads/2015/04/Por-qu%C3%A9-los-gatos-ronronean.jpg" width={{width}}/>

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {}
}