This will be tough - seeking 80s sci-fi kids movie title
Hi,
This could be any movie or even a made-for-TV movie from, say, 1981 through 1987ish. Here is absolutely everything I can recall about it -
There are at least two or three kids. They get into a situation where it becomes imperative to assemble some toy in one of the kids' rooms within a certain period. This has something to do with opening a portal, or time travel, or something like that. There's a sense of urgency about reassembling the toy.
The toy may or may not be a model dinosaur. I vaguely recall that the kid was keeping a part of it on his bedside nightstand. I also remember that when the toy is fully assembled, there are plenty of cheesy 80s post-production light effects.
Good luck with this one - I've been dying to know for years and years, and it won't be easy given so few clues. Thanks in advance to any educated guessers.