They also did a Kids pack, so that's two done already.
While there probably is a game pack worth of stuff they could do for each life stage, since they already have done stuff packs for two, it would be more consistent to do just stuff packs.
At this point Teens and Elders are the only ones I think actively *need* a stuff pack... and I'm personally stretching it with elders because while elders could use more "retirement" activities, there's really nothing that YA/Adults do that I think elders shouldn't be doing/can't do - especially based on the classes and programs for Seniors at my local park district. I also realize that I'm apparently in the minority with that stance. (There is something to be said for "once they're elders, you've probably done everything with them you were planning to do" though. I will agree with that point.)