I was on the phone with Hilary and sitting at my computer chair and Squishy was on the floor in her bouncy seat. Every time I turned away, she would get mad. Then I would look at her and she would grin from ear to ear and laugh. So of course I had to get the camera and get off the phone. After several attempts (because they never perform when you want) she did it for the camera just before she got really mad.
When your baby realizes that fussing gets them a reaction from mom or dad, it means a whole new dynamic in parenting.
And I have three of them.