Corrugated metal painted bright blue-green is used for three industrial-looking, Post-modern buildings in a loose U plan with solar glazing above the front entrance. Denver's Children's Museum, modeled after the Boston prototype, opened in a modest storefront in 1973 and graduated to this $2.8 million, 25,000-square-foot playground located between the Platte River Greenway and I-25. Russell Seacat designed this as a skeleton with flexible interior space for hands-on exhibits.