Ball-in-a-maze puzzle

Toys like this have been popular since Pigs in Clover (also spelled Pigs-in-clover) was invented by Charles Martin Crandall and then patented on September 10, 1889.

The game was a craze in the United States from mid-February to May 1889, at 8 000 puzzles being produced daily according to The Waverly Free Press.

[1][2][3][4][5] In some versions, a wooden labyrinth is tilted using two knobs and the ball has to be navigated past a series of holes and obstacles.

[2] Another version, usually molded in transparent plastic, uses the ball as a key to opening an internal compartment by manipulating the ball into position, and then operating a sliding mechanism that releases an access door.

They are sometimes called "Money Maze" banks or puzzle boxes.