In addition to the typical measurements done on babies like weight, length, body fat, head circumference, and heartrate activity, we're going deeper into baby development. We'll be recording their adorable babble to study language development, taking hair samples to examine stress levels, recording their physical activity, and using sensors like electroencephalogram (EEG) and eye-tracking to look at their attention and cognitive and social development. It's all about getting a comprehensive picture of how babies grow and thrive across the nation!