Challenging Gameplay: As a new type of puzzle game, brain maze puzzles seem simple, but are harder to pass; They are a great helper for your brain training and brain growth; The spherical shape does not require installation or battery installation, just return the ball to the finish lineFunction: These 3D maze ball toys need to observe the movement path and think about how to send the mini steel ball to the end; It is an educational toy that can cultivate your spatial cognition and logical thinking, improve your concentration and patience, relieve your stress and promote inspirationWide Compatibility: The blue and green maze puzzles correspond to the most difficult puzzles and game levels, so the steel balls inside are relatively small; While pinks and yellows are single level, so steel balls are larger; Different levels of difficulty can meet the needs of different players, from teenagers to adults to the elderly, and never outdated plastic without a smooth surface, while the tiny steel balls are confined in a transparent protective cover to safe play