#520 Go Green To-be-planted postcard.

USPS - aka US Postal Service come up with this unique postcard. It's made from fiber / recycled paper and also had tiny little seeds in it. On other side direction printed.
1. plant postcard in soil
2. water weekly
3.watch it's grow

Not sure if it will be full grown tree that produce more postcards every year :) That will be nice!