I make graduation quilts that are a large throw and less than a twin sized. I know some quilters make long twin sized so the precious grand can take the quilt to college with them. But honestly, unless you know they love quilts, it may not make it to college at all. If I were making ahead, I would make a beauty that was not age or interest specific but rather a quilt that you would love to bless them with. It is a piece of you given to them.