At the bottom of a token one can click the lowest button to add a Red, Blue, Green, etc counter. I was thinking when one clicks the button, under the colour there is a "+" and a "-". so if the Red one is out and you click the "+" a "2" will appear in the colour and this allows for stacking. This is for people who maybe have tweaked the gameplay or made their own System to have fun with friends and would make it more versatile.