In the stranger what game does Mary teach meursault?

In "The Stranger" by Albert Camus, Marie Cardona teaches Meursault how to swim. Their time at the beach symbolizes the carefree and physical aspects of life, contrasting with Meursault's emotional detachment and existential reflections. This moment highlights the simplicity of human experiences and the fleeting nature of joy in Meursault's otherwise indifferent existence.