Much of the London Design Festival, which drew to a close last week, took place in galleries, showrooms, and tucked-away locales across the city. But the Lego Greenhouse was wonderfully public. When I happened past a crowd of onlookers of all stripes was ogling the winsome structure, and those who may have been oblivious to the entire festival got a good thrill out of this big charmer.

The Design Festival itself comissioned the work, asking Bergne to devise the large-scale bit of public art. The transparent blocks and tall sunflowers were a perfect fit for the thrumming location just off the Covent Garden tube stop. And it made fine historical sense as Covent Garden (now a shopping district) was London's original fruit and vegetable market.