Elevator Etiquette

We just got home from our trip to Indianapolis, where Sarah made lots of new friends at our hotel. She's completely oblivious to the unspoken commandment: "Thou shalt not speak in an elevator." The elevator doors would open, we would squeeze in, and Sarah would look around at everyone and say, "Hi! I'm Sarah. I'm 5 years old. We're going to the 8th floor, because that's where our apartment is. We just had breakfast, and now we're going to the zoo!" or something similar.