RCA DRC616N 7-Inch LCD Portable DVD Player with 3+ Hour Battery
Great out of the box
I just purchased this to use with my toddler on long car trips.  So far, it's fantastic.  It's a nice, small unit, and quite light without the battery (which easily detaches if you don't need it).  The speakers have the capability to be very loud, and the sound quality is acceptable (though not great).  The player came with a nice little case, which can be hooked over the back of car seat (though the information in the description doesn't say this).  So...try that out before you buy a separate case. <br /> <br />It was easy to use, and the picture quality is good, with very nice, bright colors.  The resolution isn't great, but it's better than I expected.  I'll come back once we've used it for a little while.