I recently made a sim with the purpose to adopt. When it came time to adopt I got the option to choose from a bunch of different children from baby to child and it was pretty hard to just choose one. ...
I have had Eliza and Bob Pancakes be foster parents in my save (they 'adopted' Lucas Munch after fostering) and now the foster/adopted son has children, and it would have been nice to have the Pancakes acknowledged as a adoptive grand parents, if we could edit relationships. I also would love the ability to adopt siblings and have a back story (like adopted children IRL)