Yes, this maze has toxic, EPA banned Mercury in it! You guide the little glob of metal through the maze from start to finish. Remember when we used to play with this stuff in our bare hands? Ah, for the good old days.
Comes in the original plastic sleeve. The hard plastic of the maze has some superficial stress-crackling lines in the plastic, looks like from manufacturing, not from damage. You can see them in the photo. There is no leakage; the glob of mercury is held captive quite nicely.