我在哪里可以找到一些WPF的示例动画?

As I am a programmer,and not an artist or animator and I am failing at showing off the best features of WPF in my application. Although I have samples for simple animations for buttons like growing, or having the color fade into something brighter on click but what I am looking for is some showcase button animations and some showcase panel change animations to show off the best features of WPF. Normally I would go for the more subtle changes, but in a couple of cases I need something to really show off the advantages of using WPF over WinForms technology.As I am a programmer,and not an artist or anima