Once you think of the concept, it's pretty easy to make some demos to get an idea of how they would feel. I use Flash with a mix of keyframe animations and acti

Once you think of the concept, it's pretty easy to make some demos to get an idea of how they would feel. I use Flash with a mix of keyframe animations and actionscripted animations and interactions. Sure, you can only really us it in the browser, but it still lets you try out the concept. Also great for demoing to developers (assuming that's how your company is structured).