Kittens are so cute, and such a handful
But you can't help but love them. I wonder if they may have ear mites? I'm sure the vet will say if they do. We used Revolution on one of our cats that had ear mites when we first took her in as a stray. Also, I have a feral who had BAD ear mites, and I use Revolution on her monthly, and it took care of her ear mites. I swear that stuff works on them, my feral is proof of it, and I am in Florida where all the gross parasites and stuff are really bad. I don't see fleas on her either, or ticks, which is amazing in Florida, where it is hot year round.
I have not had a kitten as little as yours since I was a kid. The youngest cat I have I found at approx 5 months old, still young enough to climb the curtains
The one thing about kittens that I dont like, it seems like when they are really little, they just have really gross poop (sorry to be gross). Every one I know who has little ones says this. I think it just takes a while to get their little tummies used to what food works. When we took in Stephano, at about 5 months, he had terrible poop.....understandably so, he was a stray, but even after he was wormed and all good, I found that if I changed his food, he'd get runny poop. We found that he did fine on Wellness chicken (canned) or turkey, but anything else would tear him up, so we stuck to that for a long time for him. When he was about a year old, I tried some other varieties, and he was fine by then. Hopefully your kittens don't go through the gross poop thing!
Good luck with the new babies