Fish Eye Buttons

   
       

<StackPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <StackPanel.Resources>
        <Style TargetType="{x:Type Button}">
            <Setter Property="HorizontalAlignment" Value="Center" />
            <Setter Property="FontSize" Value="12" />
            <Style.Triggers>
                <EventTrigger RoutedEvent="Button.MouseEnter">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation 
                                Storyboard.TargetProperty="FontSize"
                                To="36" Duration="0:0:1" />
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
                <EventTrigger RoutedEvent="Button.MouseLeave">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation 
                                Storyboard.TargetProperty="FontSize"
                                To="12" Duration="0:0:0.25" />
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Style.Triggers>
        </Style>
    </StackPanel.Resources>

    <Button>1</Button>
    <Button>2</Button>
    <Button>3</Button>
</StackPanel>