I got these at Home of Poi online. I would really recommend these because they are cheap, but really durable (so far :) and super bright and colorful. Way more colorful than what the video from Home of Poi looks like. All the other LED juggling balls I found online were either super expensive or lousy. Aren't they cool?
Forget the face I'm making in that one pic. I always make weird faces when I juggle. :P