Stackers! Such a simple concept and yet…….and yet…..they are so much more. A simple, easy puzzle to delight a child? Yes, but also tunnels to drive through, mountains to climb, and gateways to another land, perhaps of fairies and dragons! Oh my! This Big Fire Stacker was slightly re-designed in 2013. We have had a little more breakage on the outer ring that we would like so we have "fattened" the rings out a bit. In doing so, we have lost a ring so there are now 4 pieces instead of the…