We have recently starting producing Zorb Balls and here is one we have done for Ace Outdoors. The zorb balls have become very popular over recent years. This version has two harnesses inside to allow two people to use it at the same here.
Here is a video link to show the zorb being used on a wet day in Snowdonia I think you will all agree it looks like fun!
http://www.youtube.com/watch?v=Q4iUMuZbThk