You'll get transparent interlocking cubes that you piece together. Some cubes simply have holes in them for the balls to fall through, some have slopes that allow balls to exit out either side of the cube, and some have slopes that allow balls to exit just one side of the cube. You can attach the cubes however you want, then see how the balls travel through the maze you've created! Cubes are color-tinted but transparent so you can watch the balls the entire time and they're made of polycarbonate so you know they're durable. The open-ended creative fun with these sets will make them a treasure at your home.