This weekend brings the ninth annual Maine Science Festival in Bangor, featuring three days of programming for all ages centered around science, technology, engineering, math and creativity, at both the Cross Insurance Center and in downtown Bangor. For a full schedule for this free festival, visit mainesciencefestival.org. Also this weekend is Maine Maple Sunday, in which we welcome this season’s first delicious batches of Maine maple syrup. Sugar houses all over the state open their doors to visitors for shopping, samples and family-friendly farm activities. For a full list, visit the Maine Maple Syrup Producers website.