A bit oblique, but an interesting use of animation skills to reflect on the pronunciation of words, which illustrates some of the relationships between different vowel sounds. It's a little naïve linguistically: it's only illustrating five vowel sounds for example, when we know there are many more than that; and the example words don't accurately represent the mapping of sounds to mouth images... see if you can explain how, using your phonetic skillz.
How to use cartoons to practice English pronunciation - JimStroud