Earth Matters to Smithsonian Gardens is this year’s Garden Fest theme, inspired by the National Museum of African Art’s exhibit Earth Matters: Land as Material and Metaphor in the Arts of Africa. This year’s Garden Fest celebration will help children and parents imagine the earth and all kinds of ways we relate to it. Activities will include pot-a-plant, art making, composting and canning demos, understanding archaeology, worm farming, and more!