Not that I think this is a 'wrong' site but it does put some things into context;
http://www.capalert.com/now_playing.htm
At the moment my two (6 and half daughter, 3 and a half son) are happily watching Dora, although give it 5 mins and they'll be fighting!
Almost the Dinsey/Pixar ones are great, although for the little ones they can be a bit long and they soon want to be playing/watching something else!
Thomas is good, but a bit boyesy - sorry just an imo
Fiffi and the Flowertots - daughter loved it when she was smaller
Rupert the Bear - both my two like watching this together
Basically get all the Ceebies stuff from Amazon!
They also like Mary Poppins and all the old classic Disney ones and the one which will get everyone sat watching for at least part of the film is Laurence of Arabia!