Plantini
It does look like it might be a headache to put together, but I'm going to ignore my nagging doubts and enjoy the whimsy of this tiny, quirky, original and post-able object.
The Plantini is a 9.5cm tall miniature hothouse made from flat-pack etched metal which comes with a planting pot, compost disc and viola seeds - and from which will grow a beautiful flower. Ahh
It's made by Another Studio an independent London design studio based at Cockpit Arts in Holborn who make, in their words, and I can't actually think of a better description "gifts for thoughtful givers". Have a scroll around the site, there are some brilliantly creative things on there including miniature architectural models of Battersea Power Station, Tower Bridge and - new to the range - Sir John Soane Museum.
Also, this cute pop-out paper 'diamond' ring - well, it is nearly Valentine's Day.