Pre-teens and mid adults BG update

In case no one was aware, we sort of already have pre-teens. It's generalized in game.. but, toddlers in reality range from.. I'd say 3-7'ish, & kids-pre-teens, 8-12? maybe? I also say this because.. in the Sims freeplay game, or one of those. I forget, they replace the child stage with pre-teen, there is no child before it. So really.. we technically already have them, they're just by another name; Maybe the smart thing would be for The Sims team to give certain activities based on age, or have some kind of in game age story progression. Maybe give them a slight growth spurt, but not super noticeable, due to game mechanics. Something that incorporates their age, maturity etc.