coin.js

var Coin = Backbone.Model.extend({
    defaults: {
        value: 0,
        image: ''
    }
});

var Coins = Backbone.Collection.extend({
    model: Coin,

    defaults: {
        player_id: 0
    }
});

index.js

var IndexView = Backbone.View.extend({

    initialize: function() {
        this.game = new Game();
        this.players = this.game.get("players");
        this.turns = this.game.get("turns");

        this.Taylor = new Player({ id: 1, name: "Taylor" });
        this.Sugar = new Player({ id: 2, name: "Sugar" });
        this.Darlene = new Player({ id: 3, name: "Darlene" });
        this.Cody = new Player({ id: 4, name: "Cody" });

        this.players.add([
            this.Taylor,
            this.Sugar,
            this.Darlene,
            this.Cody
            ]);
        
        console.log(this.players.toJSON());

        this.Taylor.get("coins").add([
            { value: 1 },
            { value: 1 },
            { value: 1 },
            { value: 5 },
            { value: 5 },
            { value: 10 }
        ]);

        this.Sugar.get("coins").add([
            { value: 1 },
            { value: 1 },
            { value: 2 },
            { value: 2 },
            { value: 5 },
            { value: 5 },
            { value: 10 }
        ]);

        this.Darlene.get("coins").add([
            { value: 1 },
            { value: 1 },
            { value: 1 },
            { value: 3 },
            { value: 3 },
            { value: 3 },
            { value: 10 },
            { value: 10 },
            { value: 20 }
        ]);

        this.Cody.get("coins").add([
            { value: 1 },
            { value: 1 },
            { value: 1 },
            { value: 1 },
            { value: 5 },
            { value: 5 },
            { value: 5 },
            { value: 10 },
            { value: 10 },
            { value: 25 }
        ]);
    },

    render: function() {
        var players_div = $("#players");

        _.each(this.players.models, function(player) {
            var p_view = new PlayerView({ player: player });
            players_div.append(p_view.render().el);
        });

        var game_div = $("#game");
        game_div.append(new GameView({ game: this.game }).render().el);

        return this;
    }

});

player.js

var Player = Backbone.Model.extend({
    defaults: {
        id: 0,
        name: '',
        coins: new Coins()
    },

    initialize: function() {
        this.get("coins").player_id = this.get("id");
    }
});

var Players = Backbone.Collection.extend({
    model: Player
});