The game includes 7 variations. Your task is to recognize the connections between the discs and the property cards and determine whether a given statement is true. The discs are divided into sectors, and as you move clockwise, a shell turns into a pearl, a pearl into an oyster, and an oyster back into a shell. This means that each image defines a specific disc. Each disc has 5 properties, and for each property, there are 5 other discs that share the same characteristic. The winner is the player who identifies the properties in the shortest time across the different game modes. Based on the work of mathematics professor Zolt n Dienes.

We may earn a small commission when you buy through these links.