We already have some teen style clothing and objects but more would be nice.
A mall, arcade, skate park, dance classes, after-school lessons (should impact their grades), graduation, prom, bikes, ice cream bar. Dropping out of school would make them adults before their time, but it would be nice to have the option. Learning to drive would be nice too - it could be a rabbit hole experience until we get cars and it should help with some skill or trait. many of these things can be enjoyed by adults too coming to think of it...