One of the things I enjoy most about staying in Japan is taking a bath. We're staying at my parents' house, and I can take a bath every day. Even in the middle of a hot Japanese summer, I still enjoy it. And I usually add bath salts. Japan has so many different kinds of bath products, with different scents, colors, and effects. Choosing one is part of the fun. One day, I dropped a bath tablet into the water and noticed something fascinating happening on the surface. It create