They are addictive, yes! Just make sure you don't get in over your head with ducklings, though. They WILL all grow up and you'll be overrun with ducks before you know it. It's always good to have a plan and a set number that you want, then just don't incubate more eggs than that, unless you know you can for sure sell them later on. I don't suppose you have an extra bathtub they could take over for awhile? You could cover the bottom with bedding and they'd have alot more space. Or any neighbors with old rabbit cages or anything like that you can borrow? You could build a simple brooder in a corner of a room as well. Put together a simple board frame, but down a big plastic liner on the bottom, and cover with bedding. You definitely need to figure out a bigger space for them very soon though, you'll have twice as many soon! I totally understand not wanting them to be "out of the house" already because it's important bonding time right now. When I raise ducklings in the house my husband has a rule that they have to move out to the Duck House at two weeks old. They are just too stinky and messy by then. Not much way around that, just cleaning frantically every couple of hours. But the bigger the space they have, the less messy and icky it will get. What are you using for bedding? Pine shavings work pretty well to help with the smell and make cleaning up fairly easy (I just go around and pick up all the poops with gloves, then tie it all up into little doggie poo bags to take outside).