This has been puzzling me for quite sometime, so I was just wondering exactly how the stoop works when you'll see like Elmo or other Muppets sitting on a step? You'd think it would be a very tight fit down there for multiple muppeteers (like when Elmo, Rosita, Grover and Zoe were all sitting on the stoop one time); and how do they recover the holes for them to stick their arms through so whenever humans have to walk on it they don't step into them?