I agree! I feel the jump from child to teenager is too big. A teen is as tall and developed as a Young adult, only skinnier. I believe a Tween would definitly add to the game. We have gotten so many more baby ages (that I love) that it only seems fitting we get one more child age.
I would also like two more adult ages: ”Middle aged” and ”Old” (or a better name for someone who is older than elder). Like this:
Newborn - Infant - Toddler - Child - TWEEN - Teen - Young Adult - Adult - MIDDLE AGED - Elder - OLD
Because you are an Adult for a very long time, and we already have ”Midlife crisis” in the game. The Middle aged Sim could just have more wrinkles than Adult.
I really want the Old age because I want to be able to make great grandparents as well. Love making big families with large family trees. And it seems silly that the Elder Sim has some backpain and then it’s time to die.
The Old Sim should need a cane, walker or wheelchair. And have more health issues than Elder, that older people usually get. They get more confused, have memory loss, have lesser hearing (the Sims need to speak louder/clearer to them) and eye sight (you can help them read for example).
I can see an Expansion Pack for this as well: RETIREMENT. Where you have retirement homes and nurses. And if you don’t want your Sim in a retirement home you could hire a day nurse and/or night nurse that comes to your house (like the cleaning service) OR have a live in nurse (like the butler).