Pixie Scientific is developing a smarter diaper with built-in urine tests that gives colorful results as scan-able QR codes. Unlike Huggie’s Tweetpee, the diapers are not continually transmitting any electronic signals to your phone. In order to monitor your pee results, you just scan the QR code. The data from your baby’s diapers can help you track urinary infections, dehydration, and possible kidney infections. You can also send information straight from the app to your pediatrician.