New Twiddle

components.component-one.js

import Ember from 'ember';

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

components.component-two.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',
  
  dynamicValue: 1,

  actions: {
    incrementDynamicValue() {
      this.incrementProperty('dynamicValue');
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{component 'component-one'
  someProperty=dynamicValue}}
<br>
<br>

<button {{action 'incrementDynamicValue'}}>Click me and check console</button>

templates.components.component-one.hbs

Bob
{{yield}}

templates.components.component-two.hbs

Joe
{{yield}}

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.8.0",
    "ember-data": "2.8.0",
    "ember-template-compiler": "2.8.0",
    "ember-testing": "2.8.0"
  },
  "addons": {}
}