The 2-layer Smart Eggs are the bigger, better, harder version of the original 1-layer Smart Eggs. The collection consists of three Dragon Eggs - blue, red and black, listed in according to their difficulty level. The first thing which makes impression is the beautiful art - on every egg there are three dragons depicted, no two of them the same. These toys have much higher quality than the original Smart Eggs - they are around twice their size, come with metal sticks, plastic stands, and much more intricate designs. Inside every egg their is a core which can rotate and also slide up and down, creating many possibilities for the stick's movement. Even though the blue egg is fairly straightforward, the red and the black ones can pose a real challenge. Smart Eggs have high replay value and you will probably find yourself coming regularly back to them. They are fun, smart and highly recommended puzzles.