I designed this game when Emily was in first grade, and by golly now that she is beginning third grade, I think she finally understands this strategy. It was fun to see her just catch on really really fast this time around. The idea of the game, is you roll a ten-sided die, and add the snap cubes to the ten-frame. Once added, you can visually see over and over again how 9+6=15 is the same as 10+5=15. And who doesn't love a quick little math game to help solidify a math strategy!