The "Tipping Chair"...

British designers BarberOsgerby have designed a 'tipping chair' for Vitra, a renowned furniture company founded in Germany and based in Switzerland.

There are two great things about this chair:

1. It somehow manages to be hugely intriguing despite its simple aesthetic.
2. The science behind it: Edward (who constitutes the Barber section of the firm's name) says "the movement increases blood flow, meaning you get more blood to the brain and increased concentration".

It's a little pricey - coming in around £200 from most outlets - but it's a great idea and being made from one mould, it should pay back the initial investment over time.