So here's a small 7 sprite Chinese abacus that might make a good addition to a Scratch OS. It has a "close" button in the upper right, an "about" button in the upper left and a "clear" button that resets the abacus in the bottom center. The abacus is draggable, by grabbing the frame somewhere other than the buttons. The seagulls are just there to provide an interesting background. I don't think they know how to use an abacus :) There are some tutorials out there on how to use an abacus. Here's one http://www.mandarintools.com/abacus.html
