I was visiting a friend, her youngster, a 2.5 year old, saw my watch and said "Hey Apple Watch". I was like, how the hell does she know about Apple Watch? She ran to me and started playing with the Watch, touched the weather icon, then asked me how to see the weather tomorrow, started scrolling through the weather forecast and then found it. She doesn't even know how to count, but she figured out how to check the weather. It was weird to witness that someone that young can actually use this thing.