Siblings going to a alien-like planet?

I watched this when I was younger so I apologize for lack of information.

I remember this being a somewhat old movie. It started with these two kids going to what I think was a relatives, maybe grandmas house? Something with the TV happened, and I think they were brought to this different land/world through the tv, if not then it was the relative.

This different world had what I remember was a large factory. Alien or robotic like creatures inhabited it, and a core memory I have of this movie is this large blob like creature being in an area of this building. I do not remember how it ended, sadly, only that they did end up back home.

andy colby’s incredible adventure?

did it seem made for kids? what year did you see it? can you remember anything else? could it have been a tv episode?