Check out these fun flash websites when you have some time to kill...don't worry, they are worth the loading time!
Make you own beat box group! (this one is really addicting, in English or French)
I just LOVE this concept! You can use a live feed of people walking around Hamburg to create your own symphony orchestra! Just assign instruments to pieces of sidewalk, street or river, and when a person or vehicle touches them you instrument gets played. It was a little jumpy on my computer, but I didn't mind because it is such a cool idea.
I just couldn't take my eyes off of this one. The animation is amazing...the butterfly and "square with frog legs" thing look like they are going to fly/jump right off of the computer screen. The drum beats are cool too.