I'm a fan of giving them swimming water. A kiddie pool would suffice. I had an ornamental pond in our backyard before we decided to add ducks, so that's now the duck pond for us. As for what else you need, just some bedding and a bowl for feed. For bedding we use pine shavings. For feeders we use rubber bowls from a farm supply store. Chicken feeders tend to have narrow openings that don't work so well for ducks' bills. Be sure that the ducks have access to water when they eat. They need to drink to properly swallow food. Our pond is their water source. If I didn't have a pond though, I would still keep the water, even if just a bowl of water, outside the duck house. Ducks are messy with their water!