My 6 year old likes ALL of these! ...and Cars, Cars 2, all 3 Madagascar movies, Monsters Inc, Meet the Robinsons, all 3 Toy Story movies...
as for older movies...i wish my kids liked those more...he kind of likes Bedknobs and Broomsticks but really isn't into the older ones...i grew up with Mary Poppins and Gnomemobile but i doubt boys would be into those
these are super for my youngest...but I am also looking for an 8 year old and and a 10 year old boy...this proves difficult b/c they don't like the "babyish" movies and I'm not ready to let them watch Act of Valor yet
Might sounds stupid, but when I was 10, my favorite movie was Flipper (you know, the dolphin thing with Elijah Wood, way before he was Frodo? LOL) I have no idea if it is on netflix though... but there is some animal in it and it changes a bit from the cartoon movie! ;-)