Send them to college with a futon. It is comfortable, great to study on, and when guests come to visit they have a place to sit or sleep. You know how compact dorm rooms are so futons can fit in well. Futons come in all sizes so a futon can go under your loft bed or in a corner. They have cleanable covers which is important! You know how messy kids can be. Covers can be changed too, so when you move next year a new cover can give you a new look inexpensively. You don't need to purchase another sofa again. This saves you money.