How do children learn such complicated skills so quickly? Some language theorists have sug- gested that children learn to use grammar so readily that our brains must be born with built-in grammar-machinery. However, we've seen that our visual-systems solve many similar problems in even earlier years-and we've also seen that when they learn to play with spoons and pails, children must learn yet other languagelike skills for managing the Origins, Destinations, Recip- ients, and Insf ruments of their actions. Thus, many sections of our brains appear to demon- strate capacities for rearranging pronome roles even before we learn to speak. If so, perhaps we ought not to wonder so much about how children learn to speak so readily. Instead, we ought to wonder why it takes so long, when they already do so many similar things inside their heads