When DD gets in the car after preschool, I begin the ride by telling her all the (pretty mundane) things I did while she was gone. She will share with me when she is ready. I learned very quickly that she did not appreciate 20 questions upon pickup. Not at all.

As far as clamming up in front of others. I thought that was pretty normal. We are lucky if we get 25% normal output from our three-year-old out in public.