Well, here's an innovative urban gardening solution — a greenhouse made of transparent LEGO bricks that grows real plants in LEGO mulch.

Okay, so this is just an art installation on display in London's Covent Garden, and the LEGO "soil" is shoveled on top of pots full of regular non-plastic dirt. And if it weren't funded by LEGO as a promotional thingy, it would cost approximately a squillion dollars to build. But come on:  LEGO? Gardening? LONDON??? We can't resist anything that brings so much awesome together into a delicious awesomeness sandwich (made with LEGO-grown lettuce, natch).