Question: how do sesame street characters work?
Answer: Rod Muppets, such as Bert, Grover, and Kermit, are handled by a single Muppeteer. His or her right hand goes in the Muppet's mouth, and the left hand works the rods that are attached to the Muppet's hands or feet. Two-handed Muppets, such as Ernie and Cookie Monster, require two handlers.