I've been looking for a long time for the name of a (probably) made-for-TV movie involving a time travel machine that spun like a small carousel, with a teenage boy and girl sitting on it. After having gone back in time, the boy and girl visit a middle-aged man's suburban house (possibly the inventor). As far as I can remember, all the characters were human.
It was an American, English language movie. That's all I can remember about it. I saw it on TV about 15 years ago. It was possibly made in the early 90s.
It's not 'The Blue Yonder' (1985).