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Send nature and oxygen – make the world a greener place with these postcards.

Leagues beyond just-add-water trinkets (dinosaur sponges, anyone?), this vegetable ink-based greeting card sends sentiments – with seeds. Just pop open your card, water the base, and sprinkle its packet over the diorama. In just a few days, you’ll have unruly sprouts of "Lepidium sativum" (that’s watercress) furling through the paper arches of your mini botanical garden.

More info: Green Postcards

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