本产品采用光学原理设计而成,形状与普通魔方相似,呈正方体(也可根据这一原理设计成其它形状)。通过正面的透明部分,能看到盒子内部的一切。当把硬币投进时,只闻其声而又不见其物,仿佛进入一个魔幻的世 This product is designed by optical principle, the shape is similar to the ordinary Rubik’s Cube, was a square (also based on this principle can be designed into other shapes). Through the front of the transparent part, you can see everything inside the box. When the coin into the time, only heard the sound but not seen, as if into a magical world