"William, don't forget your towel!" Mom shouted as she applied sunblock on the baby. William threw the folding chairs in the back of the minivan and shouted through the garage door, "OK Mom!" He then ran up and grabbed his towel. "Georgie!" William shouted. There was no response. Mom packed the baby up into the car seat. "William, can you help me with his umbrella?" William ran down the stairs, almost tripping over a chew toy, and then he helped his mother load the large umbrella in the minivan. "Mom, I can't find Georgie," William said. His mother shrugged and replied, "That's OK, William. He probably shouldn't come with us anyway." Who is George?