Coby TF-DVD7100 Portable DVD Player
Excellent for the price
I bought this for my kids for Christmas.  They love it, it is easy to use and has a great picture and  sound.  I would suggest good noise canceling headphones though.  The sound is great at home but on a plane or in a car it can be tough to hear.  I have heard this is a common problem though with portables so I would definately still suggest this one.  My parents loved it so much on a trip with them  they are buying one also.