Only Child Syndrome - A state of being when a child gets to spend all day, everyday, soaking in their parent's undivided attention. (aka..."look at me, look at me!")
This kind of behavior usually results in a very happy child; spewing with silliness, lots of chatter, good cheer, and down right cuteness.
A certain first child of mine had symptoms of this syndrome for five years. With her away at Grandma's house this weekend, a certain someone else got to taste the good life for herself.....