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Awesome found this today looking for something to show my 6 year old son without him switching off after a minute,
https://www.youtube.com/user/Kurzgesagt
Really colourful and funny at the same time, but the way they describe the science in a no nonsense way is excellent.
Give it a shot :) be warned alot of the birds get killed, you'll know what i mean when you watch it :D