There isn’t a parent in the world who hasn’t reached this milestone and exclaimed, “Five year old, hardly seems possible!” And even knowing this I find myself watching Sean putting the training wheels on the birthday bike and marveling, “Five years, it doesn’t seem possible.” Truth be told I’ve been saying it since she woke up, “Briar! Tomorrow you’ll be five years old. Five. Years. Old.” At first she looked at me with excitement, but as the day wore on the look become a gently withering sort of, “C’mon, mom, it’s been coming all year. Are you really surprised? I expected more of you?” **** I can say that it is one of those perfect examples of time’s treachery and mockery. Here today, gone…