Choosing which stroller to buy can be a tough exercise. And navigating your kids around in a city after that is a tougher exercise to follow. But if you have twins, things are bound to get doubly hard.

These double strollers don't have a problem with stairs, or elevators or buses, because designer Jade Olsson's six-wheeled T(wo)o Go stroller concept can keep rolling right up on a flight of stairs. It is pretty genius.

The stroller is designed to sit a set of twins side by side and is not only lightweight and easy to collapse, it is also more nimble which is perfect for navigating crowded areas.

Check it out here: [Jade Olsson via designboom]