This is a neat Applet application from a Japanese site called Dofi-Blog. Based on the Google translation of the site I was able to gather that the application is called Sandplay (which makes sense) and the rest is pretty intuitive. The application is designed so that the elements of sand, water, plant and fire interact with each other based on how you lay them out of the screen. Water makes the plant grow, fire destroys it. Water and sand gather on cera (which I'm assuming is something like cement) and mix together. It's not really a game but man is it addictive.