I used to always want a really cool brooder, and then I expanded my mind and realized almost anything can be one. old shelves, baby cribs, aquariums.etc., etc.... Now I have realized this applies to almost everything...So now to the point, anything that holds water can be a nice tub for ducks and ducklings, depending on the size. Just make sure they have food and are able to enter and exit freely. Here are a few ideas; This one may get hott! so yeah, you get the idea right?