Uno Reverse Coin

First creation/design. Kids always have trouble keeping track of the direction of play when playing Uno and dropping Reverse bombs, so we had the idea to make a little coin they could flip over every time a Reverse card is played--one way shows clockwise arrow, flip it over and now it's counterclockwise. Fairly simple print, doesn't take long. We printed in PLA, but it should be fine in just about any material (accounting for tension and warping properties may be needed). Fill the impressed UNO letters with nail polish to increase readability and add color. Could probably be remixed pretty easily to print in dual colors.