Creators of the popular video “Baby Shark,” whose “doo doo doo” song was played at the World Series in October and has been a viral hit with toddlers around the world, are developing a version in Navajo.Creators of the popular video “Baby Shark,” whose “doo doo doo” song was played at the World Series in October and has been a viral hit with toddlers around the world, are developing a version in Navajo.