I'm surprised so many people are shooting down this idea. I would absolutely love active school for children as well! And if it's done right, it would be a form of expanding gameplay, not instead of gameplay. As for other family members having active stuff, you get to choose whether and who to follow to where; the way these things are set up, you always have the option to just send whomever you wish to a good old-fashioned rabbithole. Personally, I enjoy playing an "ego sim" from birth to death and would love interactive stuff to do with them away from the home lot for every single life stage. At the very least, an active elementary school would create an easy game mechanic for making friends with other kids and give us a space to use all those activity tables and science kits and voidcritter battle stations and so on without having to play rich kids whose bedrooms are the size of a palace.