Nice Frogger scene XD Frogger II: Swampy's Revenge ranks up there as one of the greatest games ever created, ever.
Here is my very rough design: a Cavernous Maw from Final Fantasy XI. They look like Atomos, and if you jump into them, you travel back in time 20 years (or forward in time if you go through them from the past).
Here it is in game:
And here is my design (sorry for the giant images!):
I apologize for the horrible image quality, my camera sucks and the foil was being way too reflective. It didn't help that it can't stand on its own, either and I'm far too lazy to make a wire stand for it. It was folded from a square of green American foil, 25 centimeters to a side. This is my second ever original model, I hope you all like it

Don't make me get metaphorical with you.