Photo animation for my blog banner

Hi,

I started my blog some time ago. What I want to do is to put a GIF banner with some animation instead of a static JPEG photo.

My idea was to take some of my photos and to somehow transition them to create a GIF animation.

I'm looking for recommandation on what tools should I use? I started with Photoshop, but I don't know how to add transition effect in Photoshop.

Thanks,

Ziv