Is there a easy way to make the list box items animate one after other ?

I have a button and list box which I have binded it to an observable collection object. I have also defined an item template for the list box where I used a color animation. When i click the button I change some property of observable collection and hence trigger an animation in the list box.

I wish to animate one item at a time in list box. (i.e animate one item wait for the animation to finish then start next animation) But instead the animation occurs for all items at once.

WPF code:

<Window x:Class="WPF4.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:src="clr-namespace:WPF4"
        Title="MainWindow" Height="250" Width="325" Loaded="Window_Loaded" Name="MyWindow"><Grid Margin="10" ><Grid.Resources><src:Students x:Key="students"/></Grid.Resources><StackPanel><ListBox Name="lbtest" ItemsSource="{Binding Students, IsAsync=True}" Height="150" Width="280"><ListBox.ItemTemplate><DataTemplate><Grid><Grid.ColumnDefinitions><ColumnDefinition Width="100"/><ColumnDefinition Width="auto"/><ColumnDefinition Width= "100"/></Grid.ColumnDefinitions><TextBlock Grid.Column="0" Text="{Binding Path=Name}" /><TextBlock Grid.Column="1" Text="{Binding Path=Age}" /><Rectangle Name="myRect" Grid.Column="2" Width="10" Height="10"><Rectangle.Fill><SolidColorBrush x:Name="MyAnimatedBrush" Color="{Binding Color, NotifyOnTargetUpdated=True}" /></Rectangle.Fill><Rectangle.Triggers><EventTrigger RoutedEvent="Binding.TargetUpdated"><BeginStoryboard><Storyboard><ColorAnimation
                                                    Storyboard.TargetName="MyAnimatedBrush"
                                                    Storyboard.TargetProperty="Color" From="Orange"
                                                    To="{Binding Color}" Duration="0:0:2" AutoReverse="False" /></Storyboard></BeginStoryboard></EventTrigger></Rectangle.Triggers></Rectangle></Grid></DataTemplate></ListBox.ItemTemplate></ListBox><Button Command="{Binding ChangeColorCommand}" Content="Change !" /></StackPanel></Grid></Window>

And the C# code is as follows.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Windows.Threading;

namespace WPF4
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {

        private ObservableCollection<Student> students;
        public MainWindow()
        {
            InitializeComponent();
            this.DataContext = this;
            students = new ObservableCollection<Student>();
            students.Add(new Student() { Name = "Rajesh", Age = 22, Color = "Orange" });
            students.Add(new Student() { Name = "Dinesh", Age = 23, Color = "Orange" });
            students.Add(new Student() { Name = "Padayappa", Age = 24, Color = "Orange" });
        }

        public ObservableCollection<Student> Students
        {
            get { return this.students; }
        }
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {

        }
        private ICommand changeColorCommand;
        public ICommand ChangeColorCommand
        {
            get
            {
                return changeColorCommand ?? (changeColorCommand = new DelegateCommand(ChangeColor));
            }
        }
        private void ChangeColor()
        {
            students.ElementAt(0).Color = "Red";
            students.ElementAt(1).Color = "Green";
            students.ElementAt(2).Color = "Blue";
        }

    }
    public class Student : INotifyPropertyChanged
    {
        string name;
        int age;
        string color;
        public string Color
        {
            set
            {
                color = value;
                if (this.color != String.Empty)
                {
                    this.NotifyPropertyChanged("Color");
                }
            }
            get
            {
                return color;
            }
        }

        public string Name { set { name = value; } get { return name; } }
        public int Age { set { age = value; } get { return age; } }

        public event PropertyChangedEventHandler PropertyChanged;

        public void NotifyPropertyChanged(string propName)
        {
            if (this.PropertyChanged != null)
                this.PropertyChanged(this, new PropertyChangedEventArgs(propName));
        }

    }

    public class DelegateCommand : ICommand
    {
        private readonly Action _action;

        public DelegateCommand(Action action)
        {
            _action = action;
        }

        public void Execute(object parameter)
        {
            _action();
        }

        public bool CanExecute(object parameter)
        {
            return true;
        }

#pragma warning disable 67
        public event EventHandler CanExecuteChanged { add { } remove { } }
#pragma warning restore 67
    }
}

I am a new bee to WPF , kindly guide me in the right path to achieve this animation.