There's also a great video about the process here....
and a Google Blog by Brian Henson about his father here
I've already posted about the time I met Jim Henson and how he kept in touch right up until his death (for that blog post click here). He really was a wonderful person and I feel very thankful I was able to meet him.
Happy Birthday Jim I wonder what amazing creations you would have come up with by now....you really were ahead of your time!
Me, Jim and Kermit (1986)