How do Fozzie's ears wiggle?

[Muppetfan2011]

I was watching my Muppet Show Season One DVD recently and on most of the shows Fozzie Bear wiggles his ears, how did Frank Oz do that? is there a special button inside Fozzie or is invisible string being used for the puppet? thanks any information on this mystery would be appreciated.

 

[muppetperson]

By radio control.This feature wasnt used for long as the equipment added a lot of weight to performing Fozzie.It would be great if they brought the wiggling ears back because the motors will be much smaller and lighter now.