This document summarizes the history and activities of NUMA, an entrepreneurship lab and innovation sandbox located in Paris, France. It was founded in 2008 and has since grown to occupy 1500 square meters and host over 80,000 participants in 1200 events and 200 projects. The innovation sandbox is a facilitated space for corporate and individual entrepreneurs to meet and co-create through programs in intrapreneurship and open innovation. Some key lessons learned from working with corporates include focusing on cultural change over isolated projects, prioritizing diversity, and making serendipity desirable.