IF Du already have an older cat in the house Zeigen him/her that he/she is superior to the kitten. If this does not happen the older cat will grow to hate the kitten.
Kätzchen Liebe attention and want as much as possible but if the older cat is in the room, Du must pay attention to the older cat. Even if Du want to pet the kitten Du must pay attention to the cat.
Kätzchen don't need as much Essen as older Katzen so Du really only have to feed them when Du have meal times.
Kätzchen are very entergetic animal so Du can not keep them capitve in your arms, they will hurt themselves. Also keep anything off the floor that Du 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