I agree with f-mattox -- book a mini-suite if finances permit. There's significantly more room, and the kids will share a sofa bed rather than have pull-out upper bunks. Plus, they'd have their own TV.
If that's not possible (as it wasn't for us), a standard outside or balcony still provides sufficient room. There is plenty of closet space...important consideration, IMO.
BTW, welcome to cruise-chat!