Hey Akshar, if you need composite execution, then you can use mojito-composite-addon and ac.composite.execute() to collect the html generated by the childrens.
If you don't need composite, then you can just use mojito-partials-addon and ac.partials.render() to collect an HTML fragment generated from a view at the mojit level. API here: http://developer.yahoo.com/cocktails/mojito/api/classes/Partial.common.html#method_render