Precautions: 1. It is recommended to unpack the package and place it in a ventilated place before use, and use it after the smell has dissipated; 2. When using, please assemble according to the teeth and teeth, you can make any creative combination; 3. When using, do not touch the mat with sharp objects to avoid damage to the mat; 4. Do not let babies bite the mat with their mouths; 5. Do not use oily strokes on the mat, so as not to be difficult to remove afterwards.