If you've never heard of the small island of Tuvalu, you're not alone. This little-known country in the South Pacific is the fourth-smallest sovereign nation in the world. Home to about 10,000 people, the whole island stretches about the length of their airport runway. Drew Binsky is a travel vlogger, and in his visit to Tuvalu, he experienced first-hand what happens every night when the sun goes down — the whole island uses the wide-open airport runway as a giant playground.