This paper proposes a playful learning scenario, to enhance children's museum experience, and the design of MicroCulture, a new learning platform. MicroCulture has been developed through a participatory design process, involving around 25 children. The perspective proposed in this paper is focused on enhancing existing storytelling practices, so to provide a more tangible grounding to the communication of historical processes and to elicit a lively dialogue between children and guides. In this perspective, it is proposed to turn storytelling, as a museum learning practice, into a more dialogic and playful mode of communication.