Teen Adoption

I agree, I do the same thing and give them an immediate birthday cake but I'd like to be able to adopt teens like in real life. There is the option in the Social Interaction wheel to Adopt as Care Dependent with the Parenthood pack if you add a child without a parent to the household and I'm pretty certain that works for teens too, so that's another option. I've done this in CAS and through Split/Merge households. But to be realistic I think they should be included in the usual adoption process.