I've always got an eye out for puzzles and games that double as cool sculptural objects, and think this c. 1960 Milton Bradley "Try It" acrylic ball in maze puzzle is definitely that. There is a "start" hole and and an "out" hole molded into the clear plastic, with a red marble one is trying to progress from one to the other (and the box text assuring us that it can be done!)

This is a pretty rare one, with its original box, which is in pretty good shape, just missing the top. The puzzle itself is in good shape too, with lightsurface wear and minor scratching here and there. Approx 4 1/4" cubed.