IF Ты already have an older cat in the house Показать him/her that he/she is superior to the kitten. If this does not happen the older cat will grow to hate the kitten.
Котята Любовь attention and want as much as possible but if the older cat is in the room, Ты must pay attention to the older cat. Even if Ты want to pet the kitten Ты must pay attention to the cat.
Котята don't need as much Еда as older Кошки so Ты really only have to feed them when Ты have meal times.
Котята are very entergetic animal so Ты can not keep them capitve in your arms, they will hurt themselves. Also keep anything off the floor that Ты don't want broken. They tend to play with them.
I know this things because I myself have a kitten and cat. When they first saw each other they hissed and spit, but now they are best buds that only get on each others nerves sometimes ;D