The roof of this Stockholm house by Streetmonkey Architects turns into a ramp for children to sled on when it snows (+ slideshow). More about Pulkabacken house has a sloping roof that doubles as a sledding hill
UK studio London Atelier has updated the interior of a dilapidated terraced property, adding a new staircase, and a folding ladder for access to the roof (+ slideshow). More about London Atelier reorganises Victorian house to create multi-level apartment
Belgian artist Carsten Höller has filled the Hayward Gallery and terraces on London's South Bank with interactive installations, including a pair of spiral slides (+ slideshow). More about Carsten Höller transforms London's South Bank into a playground
London Festival of Architecture 2015: Turner Prize-nominated architecture collective Assemble has teamed up with British artist Simon Terrill to create full-size foam replicas of playground designs from architecture's Brutalist era (+ slideshow). More about Assemble's Brutalist Playground is a climbable landscape of ice-cream-coloured shapes
BIG has unveiled designs for Two World Trade Center, confirming that the skyscraper's original architect, Foster + Partners, has been ousted (+ slideshow). More about BIG unveils replacement for Foster's Two World Trade Center design
Comments update: a range of sex toys for women created to subvert stereotypes sparked a debate among readers this week about whether design could achieve the same for men. Read on for more on this and the other most commented stories on Dezeen. More about "Design should tackle the huge taboo surrounding sex toys for men"
Competition: Dezeen has paired up with New York's Metropolitan Museum of Art to offer readers the chance to win one of five pairs of tickets to an intimate talk with Chile-based architects Mauricio Pezo and Sofa von Ellrichshausen. More about Competition: win tickets to Pezo von Ellrichshausen's talk at The Met
Two house-shaped rooms project out from the facade of this three-storey residence by SoNo Arhitekti, which nestles into a hillside near an Austrian Alpine village (+ slideshow). More about Mountain View House nestles against a hillside in the Austrian Alps
The trio of stacked blocks that make up this Virginia residence by Höweler + Yoon Architecture are arranged in a bridge-like formation, providing three generations of a family with separate living spaces (+ slideshow). More about Höweler + Yoon's Bridge House accommodates three generations of a family
New York designer Karim Rashid has asked his Facebook fans to select their preferred option from four facades for a building in the city's SoHo district. More about Karim Rashid asks Facebook followers to pick facade for NY building
A concrete basin constructed inside this small apartment in Venice is designed to fend off flooding from the city's waterways. More about Act_Romegialli damp-proofs a Venetian home against the rising tides of the city's waterways
Dutch studio Kaan Architecten has added a medical research centre to a Rotterdam hospital, featuring triangular skylights, spiral staircases and a 35-metre-high bookcase (+ movie). More about Kaan Architecten adds study centre to a hospital part-designed by Jean Prouvé
Graduate shows 2015: intended to promote eating humans, the Guide to Cannibalism provides recipes for cooking meat, and also comes with kitchenware embedded with real hair (+ slideshow). More about Guide to Cannibalism suggests ways to eat humans