It’s been three years since the Cooper Hewitt Smithsonian Design Museum was first cloaked in scaffolding, but the $91 million, LEED-certified renovation has finally come to a close. The museum, located in Andrew Carnegie’s former Gilded Age mansion on Fifth Avenue, is set to reopen this Friday, December 12th. It now boasts 60% more exhibition space and a slew of new high-tech interactive features including downloadable 3D designs, multi-touch surfaces as large as pool tables and an interactive projection that allows guests to view 500 digital images of wallpaper right on the gallery walls.