Progress with My Parents' visa

So finally my parents have their visa to come to see us. Yeah!!! They will be getting their plane tickets next week to come here. We are very excited that they will be here for Hailey's birthday. My kids just know that their Chinese grandparents are coming to stay with us, but they have no idea how far away they are coming from. None the less, they know change is in the air from the fact that we set up the guess room to get it ready for my parents.