The Brainstring is a transparent plastic puzzle. For example, try to get buttons with 4 different colors on each plane. However, the buttons are connected with a rubber band. So it is not easy to achieve your goal without getting the strings tangled. With 24 buttons and 8 sides, the Advanced is truly challenging.
Difficulty level: 4 stars
Dimension: 80 x 80 x 80 mm
Material: plastic
