Grassroots Central Mass will continue its tradition of celebrating Earth Day with its 4th Annual “Trees Are Treasures” event on Saturday, April 20th from 11 a.m.-3 p.m., at Wells State Park in Sturbridge. Enjoy children's stories, songs, crafts and games Make wildflower seed bombs Take a nature stroll on the Mill Pond Trail Learn about forest preservation Discover the importance of wetlands Hear the history of stone walls Take home a tree sapling to plant! Grassroots Central Mass, a local affiliate of Indivisible Mass Coalition, is co-sponsoring this year’s event with Brookfields Fight Fear (BFF). Both groups are dedicated to…