This is sponge, isn’t it? .... “How many times should I explain? It’s sponge. It’s not an artificial product. It’s real natural sponge!” I was told the explanation Is the care worker easy? care something monitoring difference I was told the explanation while squeezing a soft yellow object with my hand. It seems that the item I have in my hand is called sponge. One of the reasons I wasn’t fully convinced of the explanation is that I don’t think natural substances are cheap and available. I believe that natural products are expensive and artificial products are cheap. Therefore, I thought that the soft item given was an artificial reproduction of a natural product called sponge. So I asked what kind of substance real sponge is, and a strange conversation started. Is the care worker easy? In various situations, we care for someone or something, and are cared for by someone. The task of caring for something is not as easy as we would like....