A simple electric motor and a system of cameras and gears close the Furby's eyes and mouth, raise its ears, and lift it off the ground in a "faux" display of mobility. The originals are still popular with many hackers as they can be dissected and made or changed to do other interesting things, including being able to say something insulting or humorous, like "Shut up". In particular, they can made be to do things with their advanced audio capabilities and various sensory interfaces. 