G10 Design has come up with the Hammokum, an interesting idea for a type of hammock balcony that clips on to the facade of your apartment. The designers write:

The Hammokum is specially designed for the "Amsterdammers." Most of the houses in the Dutch capital have no balcony and the high urban density makes the availability of an intimate space very scarce. In the hammokum you can sleep, work, read...or just enjoy the sun and the space around you.

The designers do make some sensible safety suggestions that I am certain will be printed all over the thing before it comes to North America. What a clever way of adding a little space to your apartment or giving your child a little fresh air.