Ever tried to grow a pencil? Well, this isn’t exactly a pencil tree, but it comes darn close. The eco-friendly Sprout Pencil has a seed capsule inside it. You use it like you would any other pencil. When it becomes too small to use, you plant it and water it. The seed begins to germinate after you water it a few times. The remaining pencil shaft you can leave in the ground as a position marker, or take it out and leave only the seed in the ground.