Panasonic DVD-LS50 7-Inch Portable DVD Player
Great for long flights
We purchased this DVD player prior to returning to Asia, where we currently reside.  We got it for my 18 month old.  It worked great.  He won't watch regular TV, only the Wiggles or Sesame Street.  He also won't wear the headphones we got to go with it, but we were able to keep the sound at a level where he could hear but our fellow passengers could not.  We cross the Pacific 2-3 times a year and this will be the indespensible item in the toy/activity bag.