They've been coughing for the past 3 days and sounded getting worse, I took them to clinic in the morning, and got medicine. Free of charge because kids healthcare is covered by local government, BTW. It's been very hot and we've stayed home for the most of time last week, babies having runny nose, cough, and less peeing which was not a good sigh. So I started give them formula more frequently. A video of Naoya on training here .