I searched through You Tube trying to find an appropriate Old MacDonald clip but they were either to cartoony, to boring and the kids wouldn't be interested.
Then I cam across the Fox Pail version and it has everything you could want, cartoons, but real life animals on the farm and realistic sounds they also love Jack the dog who makes an appearance.
They are giggling, clapping and mimicking along with it and I feel it has helped their understanding and development in addition to the other animal activities we do.
We have embedded it here if you want to check it out and show your little ones.
Happy Play Times :-)