One Year's Difference

The difference between a 2 year-old and a 3 year-old:

A 2 year-old will go back and finish watching Dora the Explorer on the couch in the living room, after unsuccessfully trying to open Mommy and Daddy's bedroom door on a lazy afternoon.

A 3 year-old will try to open the door, make you think that she has gone, and then magically reappear having snuck through the hallway door into your closet door and then into your room, wherein she announces "Hi, Mommy and Daddy! What you doin'?"