From all the most important Japanese Inventions I could not leave this one without comment.
First I had not read what as written there. Thought only: these want the baby cleans the floor maybe. And I was write. This cloth is made specialy to make him work. Has he to crawl on the floor? Excellent! He will do it with benefit for mother and for him. So the mother, that has not so much to do, will be more happy and ... maybe there will be not so many babies killed by their mothers.