Words.

It speaks.  Sort of.  And it points.  And now it waves.

Ivy learned in daycare that the cat on the calendar is "kitty" and will say "kitty", in a way, and do a sort of Invasion of the Body Snatchers point at the area of the calendar.  As it would turn out, we also have a cat calendar at home, so even though we have two real lives cats, when we say "Where's the kitty?"  she points in the general direction of the cat calendar, regardless if either cat is right directly in front of her.  We figure she'll eventually realize kitties are everywhere (especially in our house where one of the bathrooms is devoted to our cats).  It figures that her first word would be kitty, she LOVES the kitties, and they will learn to love her once the bald patches grown in.

She also says "dada" which mean "hey look at that thing there, I like it, it is shiny or soft or bright and I want to touch it and put it in my mouth".  The vocabulary on this kid is amazing!