Forgive me if I'm telling you stuff you already know -
I'd get them in to see the Vet asap - not because anything seems terribly wrong with them, but their eyes make it seem like they may have li'l kitty colds (aka URI - Upper Respiratory Infection, which isn't really a big deal), and it's always good to make sure they don't need deworming, or anything else (the deworming is just a pill - and some extra stinky poop for a few days).
Congrats on the new kitty. Do you know it it's a boy or a girl, and does it have a name, yet?
Orange kitties tend to have great personalities, and torties (the mama) and calicos are my favorites.