Are they good with the litter box?
Yes, Savannahs have good hygiene and learn litter box habits from their mother. All kittens should be 100% litter box trained prior to their new home. Keep in mind that kittens are babies and if given a big space with lots of freedom they could have accidents. They can get so caught up in playing and forget that they need to go until its too late. So in the beginning frequently take them to their litter box and tell them to go potty. They will learn real quick where the box is. Start them in a small room or bathroom so they can get used to their new space and then give them more freedom once you feel they are comfortable with their space. If a kitten has litter box problems there is probably a reason, like a bladder infection or sick.