I do so love snailmail (who doesn’t?), and this idea is so clever… It would be so fun to get this in the mail!

The “postcarden” is actually a shallow box, and it comes with a packet of seeds.  You water the seeds for two weeks, and you get a small crop of cress, which is also edible! 

It’s currently only available in the EU, but Aimee, the creator, plans to expand production soon.