This is called innovation: it can replace the itouch protective cover with different expressions.

How do you stand out when protective cover products are becoming increasingly popular? Griffin succeeded. They are an innovative company. Today, they launched a chip named faces case. This product is not so much an iPod Touch protective cover as a toy. It uses a design similar to a hand-held toy on the back, with six eyes with different expressions and three mouth with different expressions, You can freely combine these expressions to make your iPod Touch cover look different. If you like, you can also give your iPod Touch a better facial expression every day based on your mood. The playability is quite high, I think this is already a product out of the protective cover category. I think it will soon make a storm.