Moving Wrap Animation Elements

I am trying to create an animation, such as text scaling animation, which exists in the wii news channel. See this at 0:45 for an example.

My current code is to take a line, break it into a line [] between spaces, create a text block for each word and paste it into the list of text blocks.

After that, I need to specify it as an ItemSource WrapPannel and change the font of each text block to create a zoom effect. This will make the correct positioning, but without animation.

I also searched for FluidMoveBehavior, but I don't know how to apply this to my situation.

How can I animate the movement of elements in a wrapper panel? Is my approach the best way to do this?