What Do Babies Know?

I put this link in an update on my earlier post. But just so you don't miss it, here it is again. Please note that my memory failed me in my description of the experiment earlier. I combined the details/concepts of two different experiments: one where a train changes color as it passes through a tunnel and another where a hinged wooden panel passes through a box. A fault of memory, I hope, not some infantile need to reject the concept of "naive physics."