Bouncing Ball with DoubleAnimation

   
      
<Canvas xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:s="clr-namespace:System;assembly=mscorlib">


    <Ellipse Name="elips" Width="24" Height="24" Fill="Red" 
             Canvas.Left="96">

        <Ellipse.Triggers>
            <EventTrigger RoutedEvent="Ellipse.Loaded">
                <BeginStoryboard>
                    <Storyboard TargetName="elips" RepeatBehavior="Forever">
                        <DoubleAnimation 
                                Storyboard.TargetProperty="(Canvas.Top)"
                                From="96" To="480" Duration="0:0:1"
                                AutoReverse="True" />
                    </Storyboard>
                </BeginStoryboard>
            </EventTrigger>
        </Ellipse.Triggers>
    </Ellipse>
</Canvas>