Gymboree Outlet 485 Arsenal St, Watertown, MA02472 A children's clothing store in the Arsenal Mall, Gymboree Outlet carries a wide range of products. Besides shoes and…More conventional apparel, specialty items such as Halloween costumes are frequently displayed. The interior is bright and colorful, with a television running Gymboree programming in the back of the store. Tables and displays are arranged in rows throughout the store. All items are Gymboree products.