“Star Bird” — A space ship that made noises when you changed its pitch. It could be put together into a couple of different configurations. It wasn’t tied to any tv show, movie, or comic book.
Micronauts — a time traveling group of futuristic translucent android action figures that had cool vehicles and accessories you could reconfigure like Lego. Some of these floated on water, others had shootable rubber-tipped missiles, and some could be put together to make giant robots. The best set to me was the one I couldn’t afford, but that a friend had. A Logan’s Run style tube train set propelled using a vacuum pump. There later was a comic book series that tried to explain their backstory.
ROM — a silver robot doll with red led eyes that made different noises depending on which of his accessories you attached. Also later had a comic book series that tried to explain it all.