Two DCK's (age 3.5 and 4.5) are playing in the other room.
The older one says: "Stop doing that or you are not coming to my birthday party!"
the younger one says: "I will call your mom and I will come anyways"
older one: "You don't know my number!"
younger one: "Uh huh, its 8, 15, 7"
older one: "Wow, how did you know that?"