Project Malmo is an open source AI experimentation platform that supports fundamental AI research. With the platform, Microsoft provides an experimentation environment in which promising approaches can be systematically and easily compared, and that fosters collaboration between researchers. Project Malmo achieves is built on top of Minecraft, which is particularly appealing due to its design; open-ended, collaborative, and creative. Project Malmo particularly focuses on Collaborative AI – developing AI agents that can learn to collaborate with other agents, including humans, to help them achieve their goals. To foster research in this area, Microsoft recently ran the Malmo Collaborative AI Challenge, in which more than 80 teams of students worldwide, competed to develop new algorithms that facilitate collaboration. This demo demonstrates the results of the collaborative AI challenge task and shows selected agents and how new tasks and agents can be easily implemented.