How to introduce 2 new kittens to 2 old cats?

[Happy Bunny]

2 days ago I got two eight week old kittens. They are brother and sister and we named them Max and Jazzy. I adopted a 6 month old kitten a few years back that was very shy at first and hid under the bed. She came from more of a shelter while these kittens were part of a rescue and in foster care. They never hid from us and are so outgoing!

Anyway, back then, I adopted a 6 months old Carly and introduced her to my 2 male cats Tiger and Oreo. They all hissed a bit, but eventually grew to except the new cat.

Fast foward to now, Oreo passed away and Now I have a 8 year old male, Tiger and a 4 year old female, Carly. They don't interact much, but don't fight at all. They basically just ignore eachother. We were planning on getting a kitten so Carly could have someone to play with. Tiger is pretty lazy and just wants to chill.

I was able to introduce one cat, but how am I suppose to introduce 2 kittens at the same time! Any help is appreciated

 

[Eagles Fly]

The same as you did with the one. If that doesn't work try something different.