City PostCarden is enjoyable for all ages all year round - send one to a friend and brighten up their mailbox! Simply open and build into its urban landscape, place on a tabletop or windowsill and add water. In a matter of days your card will start to grow and will keep for 2 - 3 weeks. Watch out timelapse animation of the one PostCarden growing. The front illustration is by Millie Harvey. Contents Instructions, cress seeds, waterproof tray Materials FSC Paperboard and APET tray Dimensions 155 x 18 x 95 mm