Professor Yaffle was the most complicated puppet and the most agile being the only one with moving legs and feet. To keep him upright during filming his feet had to be tacked to the surface. The tacks can be seen appearing and disappearing in various combinations in the four small holes in each foot, depending on what position he was adopting. See more
Once upon a time, not so long ago, there was a little girl and her name was Emily, and she had a shop.
[picture of Emily's shop appears
There it is. It was rather an unusual shop because it didn't sell anything. You see, everything in that shop window was a thing that somebody had once lost, and Emily had found, and brought home to Bagpuss.