What would you do if your kids aren't handling Manila summer well? Any tips on how to help then get through this heat?

Make sure there is enough ventilation in the house. In our household, we expect the air condition to be turned on for almost 24hours or as needed by the kids during summer. And yeah, always serve them with fruit juices, shakes or frozen delight to keep them hydrated. I also let my kids take the shower at least 3 times a day if the heat is really unbearable.