I am a family player and I would love tweens, there quite a few options you could include:
- limited romance with other tween sims
- middle sschool
- feeling tense and the buff 'my body is changing?'
- actually growing
- getting their first persion and feeling tense, or getting a wet dream and feeling embarrased
- 'do i like him?' introduces the idea of crushes, even though this could be a teen thing
- varied curfews
- 'look at body' option in the mirror (it sounds wierd but its meant to be realistic, right?)
- 'why is nothing happening?' possibly a late bloomer
- custom tween traits 'fast bloomer', 'late bloomer' etc..
i have more and feel free to ask, but i cant be bothered to type more, haha