Discover the innovative Docker playground, Play With Docker (PWD), in this conference talk by Docker captains Marcos Nils and Jonathan Leibiusky. Learn about the free Alpine Linux Virtual Machine in the cloud that allows users to build and run Docker containers and create clusters with Docker Swarm Mode. Explore the underlying Docker-in-Docker technology that simulates multiple VMs/PCs. Gain insights into the development process, new features, and potential applications of PWD. Understand how this tool can enhance Docker learning and experimentation for developers and system administrators working with distributed applications and machine learning microservices.