Following the Montessorian studies based on the observation of real nature, the box contains 40 cards for a total of 20 pairs of animals, divided between parents and puppies of the same species. The activities of the memory game allow to train executive functions of the child concurring in carrying out the tasks of everyday life: Memorising, Recognising, Classifying, Categorising, Associating, Sorting by logic. In this box, the ability developed is Thinking: through a simple game like memory, cognitive development is supported, from perception to attention to visual-spatial memory.