penny is very good at counting to three. we do it all the time, so she has the concept of three being more than one and more than two, understands that things happen to her when we get to three, and i THINK she knows that there are bigger numbers, but is not quite sure how to get to them. for example, last night, while changing her:
me: penny, let's practice counting. i'll start. one...
she is already better at math than i am!