This item is a dream for taking the boredom out of long trips. I recommend purchasing with a marble maze toy (like Amaze-N-Marbles 60-Piece Set), then entertain yourself by using a combination of short, sharp jerks of the steering wheel and smoother, longer turns to maneuver the marbles through the maze you built 5 miles ago.

Note: only attempt this on an Interstate! The constant stops and turning in a town or city will quickly spoil your attempts at getting the marble through the maze! Learn from my frustration.

Pros: endless hours of interstate entertainment
Cons: needs a wall or lip to catch missed marbles. When I'm learning a new maze I find I have to take my seatbelt off too often to rummage under the seat to recapture a wayward marble. Too often they end up in the passenger foot well, which is a bit chancy to retrieve in my car (I don't have cruise control).