Membership Join the Maine Discovery Museum Members are the very foundation of successful organizations. Your membership ensures MDM can continue to fulfill its mission, provide new exhibits and plan exciting public programming that incorporates aspects of Maine into a greater understanding of the world in which we live. Plus, as a member, you'll receive some amazing benefits! Become a member today and support the Maine Discovery Museum! The Maine Discovery Museum is loaded with kid's activities! Looking for things to do with children? The Maine Discovery Museum is a great place to find things to do with kids of all ages!