Finally!!! After countless attempts, the Head of the Family or 30 grandchildren badge finally triggered for me!!
https://i.imgur.com/ikXXsckm.png
I have tried so many iterations of the game doing actions as suggested by other players which finally had the badge trigger for them but which did not work for me. For my successful attempt, I tried two actions that I think may be the reason the badge triggered: I created a new Challenge Data file and I did not kill off the grandfather. I am not sure if either or both were the reason the badge triggered after all this time.
As I posted earlier in this thread, I had read the Challenge Data file could become corrupt. So, I created a clean Sims 3 folder but did not copy in any of the the files from my previous downloads folder. The game created new a Challenge Data file.
For all my previous attempts, I followed the advice that only one grandparent should live in the household. I had either deleted the grandfather in Create A Sim before I started the new game or I had moved the grandfather out of the house. A player told me the badge finally triggered for her when she moved the grandfather back into the household. I no longer had any save with the grandfather available for me to try to move him back in. So, I started a new game and created the "grandmother" and "grandfather" in CAS. I also used the genetics option to create two children for them. I moved the family into a house. I had the "grandmother" and "grandfather" have another child. After their third child aged up, I moved the "grandfather" and third child into another house in the town. The badge did not trigger after the 30th and 31st grandchildren were adopted. I then moved the grandfather back into the household using Edit Town and merge. Still no badge. Following other advice I have received in this thread, I had his daughter adopt one more child. Poof, the elusive badge appeared.
Thank you to all of you who have provided me with advice for this badge.
