What's inside them Muppets?

There was this one scene in a horror series I remember watching that showed a kid being afraid of a puppet. Apparently, the puppet has a "vengeful spirit" living inside of it and would later end up doing some "unspeakable" things (lol). Now that I think about it, there has been a lot of these "scenes" - or something like it - shown lately. Is it becoming trend in horror films?Whatever happened to