Jupyter Notebooks have been developed by the HDF Group and many others to help scientists and other users understand how to use HDF to create and access datasets in many disciplines. HDF Lab is a tool for bringing these resources together with data in the cloud. The Lab will include sample datasets and notebooks that use them to demonstrate HDF capabilities at many levels. It will also be a place for sharing data examples and related notebooks from users in many disciplines. ESIP members will play an important role in building this resource and ensuring that it is a useful forum for sharing community expertise. Please join us at the ground level to make sure it works.