The HDPE sandwich panel is made of HDPE plastic. It is three colors, the top and bottom are the same color, and the middle is another color that contrasts more clearly. The surface texture is orange peel. There are various bright colors and sizes to choose from. HDPE two-color board is non-toxic, tasteless, safe and environmentally friendly, and will not harm the children’s body or cause pollution to the environment. The color sandwich panel allows us to engrave any patterns, shapes, words, letters or numbers through CNC machines, and we can also expose the color of the middle surface by engraving the surface layer, which is very beautiful and practical.