My ducks LOVEEEE mirrors of any kind, bells, cat toys with bells, and feathers hanging from them. Canadian worms from walmart and I throw dried mealworms around for them to forage. Little cat balls, they will pick them up and throw them! There's a lettuce cage ball for chickens, they have that too. They really just love eating and searching in water for food. In the summer I like to put ice in their pool. They love to chase me around the pool, while they are in it and I'm on the outside. They are just hilarious lil quackers!