I got one back in the '70s. Here’s the description:
Imagine a plastic sorta cube, about 4 inches per edge.
Inside are about 100 “BBs,” only they were smaller than “BBs,” as I recall.
Inside the cube are various “levels,” like in a parking garage, such that when you turn the cube over, the tiny BBs go racing down the first ramp, drop to the second, go racing till they drop to the third, etc–each “level” reversing the direction.
That’s all it did. You turned it back over, and the BBs wend zig-zagging downward until they had all landed at the bottom.
The only other thing I remember about it was that the “instruction” card that came with it made a reference to the Empire State Building, saying that if you dropped these same BBs from the top of the Empire State Building, they would reach the ground 1200-odd feet below long before the BBs traveled a net drop of about 4 inches.
I think it was called “Running Wild,” but I’m not sure of it.
Any ideas???