also, there are some nice things about having the last one on their own- which neither of you have ever had. You had your 1st one for 5 years on her own, now you get some time with your son on his own- and he gets to be the center of the universe for a bit. The dynamics of the household will inevitably change, and that can be fun for everybody. With my last one coming through we are eating different foods (fewer tastes to accommodate), some of who does what has changed (and somethings we’ve just stopped doing…), Have fun with it, savor it…
also on a practical note: the oldest one gave the youngest one a monthly subscription package (international snack foods, since you asked) (like yours, they are in different countries- it took a bit to find a package that worked for both places w/out ridiculous postage)- one for each of them. When they arrive they plan a video chat and try them at the same time.