A child's hearts normally beat faster than an adult's. A healthy adult heart rate can range from 60 to 100 beats per minute during rest.
Kids' heart rates can be as low as 60 beats per minute during sleep and as high as 220 beats per minute during strenuous physical activity. It's normal for athletic kids to have slower resting heart rates, often in the 40s or 50s.
A baby cannot taste salt until it is 4 months old.
Baby kneecaps don't show up in x-rays, but your baby does have kneecaps.
A baby could hear your voice and other sounds from about 23 weeks of pregnancy.
From birth to toilet training, a baby goes through an average of 7000 diaper changes.