I was looking into interactive classroom activities, not only for use in the classroom, but to use in workshops I put on for new teachers and TTOCs. Nothing is worse than a lecture style (though it has it's place) lesson. I need to get up and move (unless it is early morning and I haven't had my coffee!)
I found this site: http://www.yawnbuster.com/Yawnbuster_attentiontrainers.html
With a name like "yawn buster" it caught my attention! The fact that it said "click here for free trial" lost most of my attention.
Still, browsing the free trial, samples and previews, there are some great ideas that you may wish to purchase or create yourself/adapt.