backbone.js events and el

Okay, so I've read several other questions regarding Backbone views and events not being fired, however I'm still not getting it sadly. I been messing with Backbone for about a day, so I'm sure I'm missing something basic. Here's a jsfiddle with what I'm working with: http://jsfiddle.net/siyegen/e7sNN/3/

(function($) {

    var GridView = Backbone.View.extend({
        tagName: 'div',
        className: 'grid-view',
        initialize: function() {
            _.bindAll(this, 'render', 'okay');
        },
        events: {
            'click .grid-view': 'okay'
        },
        okay: function() {
            alert('moo');
        },
        render: function() {
            $(this.el).text('Some Cow');
            return this;
        }
    });

    var AppView = Backbone.View.extend({
        el: $('body'),
        initialize: function() {
            _.bindAll(this, 'render', 'buildGrid');
            this.render();
        },
        events: {
            'click button#buildGrid': 'buildGrid'
        },
        render: function() {
            $(this.el).append($('<div>').addClass('gridApp'));
            $(this.el).append('<button id="buildGrid">Build</button>');
        },
        buildGrid: function() {
            var gridView = new GridView();
            this.$('.gridApp').html(gridView.render().el);
        }

    });

    var appView = new AppView();

})(jQuery);

The okay event on the GridView does not fire, I'm assuming because div.grid-view does not exist when the event is first bound. How should I handle the binding and firing of an event that's built on a view dynamically? (Also, it's a short example, but feel free to yell at me if I'm doing anything else that I shouldn't)