This is a fun, learning experience and game. Different variations allow one player to be challenged to see how many marbles they can accumulate within the maze and how many marbles can fall down to the bottom in one turn. You can play with two players. This product was designed by an artist who has developed audio-kinetic sculptures in museums across the country. This is an interesting experience but also helps your child to learn gravity and some scientific principles as well. From a company that has many excellent, high quality materials.