The Little Hen With Poop In Her Backpack Penny the little hen sets out on a very important mission. Before she leaves, she fills her backpack with steaming-hot poop. But why? On her adventure she will meet a flower, a frog, a mushroom, a tractor and a crocodile. Everyone thinks that Penny is gross because of the smelly poop in her backpack, but that doesn't stop her. She's on a mission - and she needs to complete it.