Twins room help.... boy girl (long post)

In February my twins will move to their own room together. I'm having trouble exactly designing the room. This is what I got so far

Her side wall will be pink his blue then other two walls grey

This will be flooring (new)

Chair for corner for me to sit in while they play with toys

Wall decor

Cubby storage going to turn on side for books and toys

I'm just not sure what else to do to tie the sides together. Everything I'm finding is dinosaur or trucks typical boy stuff but I want something more sophisticated I think word would be till they both find stuff they like then can change decor.

Show me your twin rooms!!