A lot about the birthing experience has changed during the past 50 years. A lot about child psychology hasn’t. For example, sibling rivalry: sometimes, a kid just isn’t ready for some little squirt to come along and invade his space—his own room. So what if there’s an extra bed in the room…isn’t that were the stuffed animals are supposed to sleep? How could a couple of otherwise sensible parents just bring a new kid home without even consulting their very own son? Still, a younger sibling can be in need of a big brother’s guidance. And a big brother, even if not so very big, can have a lot to offer—once he gets used to the idea.