Having two kids in 21 months mostly has kicked my butt up and down the sidewalk. I've been worn out for a year now, through a tough pregnancy and recovering from a c-section and having a toddler and a newborn. And now I have two kids teething at the same time and all that crap. But you know what? There are times that make it all okay. My kids adore each other, and they're so young that they will never have any memory of life without the other one around. Tonight was one of those wonderful times when I caught a glimpse of how much they are fascinated with each other.