This YouTube quiz plays 22 different audio clips of native speakers of regional varieties of Englishes (British, New Zealand, Australian, Canadian, Singaporean, Jamaican, Welsh, Indian, South African, Irish etc).  It is a really effective way to demonstrate to students that native speakers of English can sound very different from one another, and that there are many unique varieties of English spoken around the world, (even within different regions of the same country).  Have your students take the quiz for fun, or better yet, have them watch you take the quiz!