This is a fun game to see who knows their colors. You'll notice the gray card has an empty oval at the bottom...that's white. I enclosed a few extra blank cards in case you want to add other colors. For instance, I used aluminum foil on one spare oval for silver, & gold wrapping paper on another. If you do this, don't forget to glue it on before you laminate the card! Also, be sure to put the number 1, a star, or something on the back of the RED/YELLOW card so you will know where to begin the game. My kids love this...hope yours will, too.