5 Stars!!

Hi i’m 8 Year Old River From York Pennsylvania I Want to Say Thank You to Olivia and Her Dad For the Amazing Letters!! I Loved Them i’m Curious About How Does Our Stomach Work? And Who invented Fire Trucks? And How do Surgery Doctors Know That Surgery is necessary? How Do Thermometers Work? I’m Curious How Does a Thermometer Know What Your Body Temperature is? Maybe You Can Cover One Of These Topics in a Future Episode!